dB Re 1V (ENTER ->) -38.0= V/Pa 0.012528= mV/Pa 12.52818- or, another way -= mV/Pa (ENTER ->) 12.82= V/Pa 0.0128= dB re 1V -37.84

Max SPL? (ENTER ->) 90= Pa? 0.632456= Max V? 0.007924= Max mV? 7.923518= dBu? -39.80767= dBV? -42.02164= dBm? -39.80315

SPL, dB Re 20E-6 Pa Pa, RMS dBu dBm dBV V RMS mV RMS0 0.00002 -129.81 -129.80 -132.02 2.506E-07 2.506E-041 2.24E-05 -128.81 -128.80 -131.02 2.811E-07 2.811E-042 2.52E-05 -127.81 -127.80 -130.02 3.154E-07 3.154E-043 2.83E-05 -126.81 -126.80 -129.02 3.539E-07 3.539E-044 3.17E-05 -125.81 -125.80 -128.02 3.971E-07 3.971E-045 3.56E-05 -124.81 -124.80 -127.02 4.456E-07 4.456E-046 3.99E-05 -123.81 -123.80 -126.02 4.999E-07 4.999E-047 4.48E-05 -122.81 -122.80 -125.02 5.609E-07 5.609E-048 5.02E-05 -121.81 -121.80 -124.02 6.294E-07 6.294E-049 5.64E-05 -120.81 -120.80 -123.02 7.062E-07 7.062E-04

10 6.32E-05 -119.81 -119.80 -122.02 7.924E-07 7.924E-0411 7.1E-05 -118.81 -118.80 -121.02 8.890E-07 8.890E-0412 7.96E-05 -117.81 -117.80 -120.02 9.975E-07 9.975E-0413 8.93E-05 -116.81 -116.80 -119.02 1.119E-06 1.119E-0314 0.0001 -115.81 -115.80 -118.02 1.256E-06 1.256E-0315 0.000112 -114.81 -114.80 -117.02 1.409E-06 1.409E-0316 0.000126 -113.81 -113.80 -116.02 1.581E-06 1.581E-0317 0.000142 -112.81 -112.80 -115.02 1.774E-06 1.774E-0318 0.000159 -111.81 -111.80 -114.02 1.990E-06 1.990E-0319 0.000178 -110.81 -110.80 -113.02 2.233E-06 2.233E-0320 0.0002 -109.81 -109.80 -112.02 2.506E-06 2.506E-0321 0.000224 -108.81 -108.80 -111.02 2.811E-06 2.811E-0322 0.000252 -107.81 -107.80 -110.02 3.154E-06 3.154E-0323 0.000283 -106.81 -106.80 -109.02 3.539E-06 3.539E-0324 0.000317 -105.81 -105.80 -108.02 3.971E-06 3.971E-0325 0.000356 -104.81 -104.80 -107.02 4.456E-06 4.456E-0326 0.000399 -103.81 -103.80 -106.02 4.999E-06 4.999E-0327 0.000448 -102.81 -102.80 -105.02 5.609E-06 5.609E-0328 0.000502 -101.81 -101.80 -104.02 6.294E-06 6.294E-0329 0.000564 -100.81 -100.80 -103.02 7.062E-06 7.062E-0330 0.000632 -99.81 -99.80 -102.02 7.924E-06 7.924E-0331 0.00071 -98.81 -98.80 -101.02 8.890E-06 8.890E-0332 0.000796 -97.81 -97.80 -100.02 9.975E-06 9.975E-03

Instructions for use:

* Enter values in cells B1, B5, and B9 ONLY (if you want to go in and protect all but those cells, feel free to do so). Here is what those cells control:

* Cell B1 is the commonly-stated microphone sensitivity on many data sheets. Enter the microphone of interest's sensitivity on that line.Once you enter the value in cell B1 then the microphone's sensitivity is returned in both Volts / Pascal (V/Pa) and millivolts / Pascal in cells B2 and B3 respectively. NOTE: Cell B2 is used as part of the table of calculations below - don't mess with it.

* Cell B5 is a variation on the calcs made using cell B2. I put it in as a sort of cross-check. Its calculations are not used in the tabular summary below. Again, it's just a check, but what it does do is allow you to enter the microphone sensitivity in mV/Pa (a common spec for a certain classification of mics) and return the older but possibly more familiar 'dB re 1 V @ 1 Pa' figure.

* Cell B9 is the maximum SPL you are anticipating (you enter the value). The cells immediately below return calculations for the pressure (Pa) as well as voltage )RMS) that corresponds, as well as the associated dBU, dBV, and dBM values - again, this is based on the value entered in cell B1. The table calculates (based on dB) the equivalent pressure, and based on mic sensitivity, the voltage (as well as dBu, dBm, and dBV) for a given SPL. Thus, if you need a quick path to the dBu value to expect, just enter the appropriate value in cell B1 and look for the max SPL on the table.

Spreadsheet written by Mark A. Jay. Questions or comments should be directed to him at mark@immersifi.com or contact him via skype (mark.a.jay). May 8, 2010 (MAJ)

33 0.000893 -96.81 -96.80 -99.02 1.119E-05 1.119E-0234 0.001002 -95.81 -95.80 -98.02 1.256E-05 1.256E-0235 0.001125 -94.81 -94.80 -97.02 1.409E-05 1.409E-0236 0.001262 -93.81 -93.80 -96.02 1.581E-05 1.581E-0237 0.001416 -92.81 -92.80 -95.02 1.774E-05 1.774E-0238 0.001589 -91.81 -91.80 -94.02 1.990E-05 1.990E-0239 0.001783 -90.81 -90.80 -93.02 2.233E-05 2.233E-0240 0.002 -89.81 -89.80 -92.02 2.506E-05 2.506E-0241 0.002244 -88.81 -88.80 -91.02 2.811E-05 2.811E-0242 0.002518 -87.81 -87.80 -90.02 3.154E-05 3.154E-0243 0.002825 -86.81 -86.80 -89.02 3.539E-05 3.539E-0244 0.00317 -85.81 -85.80 -88.02 3.971E-05 3.971E-0245 0.003557 -84.81 -84.80 -87.02 4.456E-05 4.456E-0246 0.003991 -83.81 -83.80 -86.02 4.999E-05 4.999E-0247 0.004477 -82.81 -82.80 -85.02 5.609E-05 5.609E-0248 0.005024 -81.81 -81.80 -84.02 6.294E-05 6.294E-0249 0.005637 -80.81 -80.80 -83.02 7.062E-05 7.062E-0250 0.006325 -79.81 -79.80 -82.02 7.924E-05 7.924E-0251 0.007096 -78.81 -78.80 -81.02 8.890E-05 8.890E-0252 0.007962 -77.81 -77.80 -80.02 9.975E-05 9.975E-0253 0.008934 -76.81 -76.80 -79.02 1.119E-04 1.119E-0154 0.010024 -75.81 -75.80 -78.02 1.256E-04 1.256E-0155 0.011247 -74.81 -74.80 -77.02 1.409E-04 1.409E-0156 0.012619 -73.81 -73.80 -76.02 1.581E-04 1.581E-0157 0.014159 -72.81 -72.80 -75.02 1.774E-04 1.774E-0158 0.015887 -71.81 -71.80 -74.02 1.990E-04 1.990E-0159 0.017825 -70.81 -70.80 -73.02 2.233E-04 2.233E-0160 0.02 -69.81 -69.80 -72.02 2.506E-04 2.506E-0161 0.02244 -68.81 -68.80 -71.02 2.811E-04 2.811E-0162 0.025179 -67.81 -67.80 -70.02 3.154E-04 3.154E-0163 0.028251 -66.81 -66.80 -69.02 3.539E-04 3.539E-0164 0.031698 -65.81 -65.80 -68.02 3.971E-04 3.971E-0165 0.035566 -64.81 -64.80 -67.02 4.456E-04 4.456E-0166 0.039905 -63.81 -63.80 -66.02 4.999E-04 4.999E-0167 0.044774 -62.81 -62.80 -65.02 5.609E-04 5.609E-0168 0.050238 -61.81 -61.80 -64.02 6.294E-04 6.294E-0169 0.056368 -60.81 -60.80 -63.02 7.062E-04 7.062E-0170 0.063246 -59.81 -59.80 -62.02 7.924E-04 7.924E-0171 0.070963 -58.81 -58.80 -61.02 8.890E-04 8.890E-0172 0.079621 -57.81 -57.80 -60.02 9.975E-04 9.975E-0173 0.089337 -56.81 -56.80 -59.02 1.119E-03 1.119E+0074 0.100237 -55.81 -55.80 -58.02 1.256E-03 1.256E+0075 0.112468 -54.81 -54.80 -57.02 1.409E-03 1.409E+0076 0.126191 -53.81 -53.80 -56.02 1.581E-03 1.581E+0077 0.141589 -52.81 -52.80 -55.02 1.774E-03 1.774E+0078 0.158866 -51.81 -51.80 -54.02 1.990E-03 1.990E+0079 0.17825 -50.81 -50.80 -53.02 2.233E-03 2.233E+0080 0.2 -49.81 -49.80 -52.02 2.506E-03 2.506E+0081 0.224404 -48.81 -48.80 -51.02 2.811E-03 2.811E+0082 0.251785 -47.81 -47.80 -50.02 3.154E-03 3.154E+00

83 0.282508 -46.81 -46.80 -49.02 3.539E-03 3.539E+0084 0.316979 -45.81 -45.80 -48.02 3.971E-03 3.971E+0085 0.355656 -44.81 -44.80 -47.02 4.456E-03 4.456E+0086 0.399052 -43.81 -43.80 -46.02 4.999E-03 4.999E+0087 0.447744 -42.81 -42.80 -45.02 5.609E-03 5.609E+0088 0.502377 -41.81 -41.80 -44.02 6.294E-03 6.294E+0089 0.563677 -40.81 -40.80 -43.02 7.062E-03 7.062E+0090 0.632456 -39.81 -39.80 -42.02 7.924E-03 7.924E+0091 0.709627 -38.81 -38.80 -41.02 8.890E-03 8.890E+0092 0.796214 -37.81 -37.80 -40.02 9.975E-03 9.975E+0093 0.893367 -36.81 -36.80 -39.02 1.119E-02 1.119E+0194 1.002374 -35.81 -35.80 -38.02 1.256E-02 1.256E+0195 1.124683 -34.81 -34.80 -37.02 1.409E-02 1.409E+0196 1.261915 -33.81 -33.80 -36.02 1.581E-02 1.581E+0197 1.415892 -32.81 -32.80 -35.02 1.774E-02 1.774E+0198 1.588656 -31.81 -31.80 -34.02 1.990E-02 1.990E+0199 1.782502 -30.81 -30.80 -33.02 2.233E-02 2.233E+01

100 2 -29.81 -29.80 -32.02 2.506E-02 2.506E+01101 2.244037 -28.81 -28.80 -31.02 2.811E-02 2.811E+01102 2.517851 -27.81 -27.80 -30.02 3.154E-02 3.154E+01103 2.825075 -26.81 -26.80 -29.02 3.539E-02 3.539E+01104 3.169786 -25.81 -25.80 -28.02 3.971E-02 3.971E+01105 3.556559 -24.81 -24.80 -27.02 4.456E-02 4.456E+01106 3.990525 -23.81 -23.80 -26.02 4.999E-02 4.999E+01107 4.477442 -22.81 -22.80 -25.02 5.609E-02 5.609E+01108 5.023773 -21.81 -21.80 -24.02 6.294E-02 6.294E+01109 5.636766 -20.81 -20.80 -23.02 7.062E-02 7.062E+01110 6.324555 -19.81 -19.80 -22.02 7.924E-02 7.924E+01111 7.096268 -18.81 -18.80 -21.02 8.890E-02 8.890E+01112 7.962143 -17.81 -17.80 -20.02 9.975E-02 9.975E+01113 8.933672 -16.81 -16.80 -19.02 1.119E-01 1.119E+02114 10.02374 -15.81 -15.80 -18.02 1.256E-01 1.256E+02115 11.24683 -14.81 -14.80 -17.02 1.409E-01 1.409E+02116 12.61915 -13.81 -13.80 -16.02 1.581E-01 1.581E+02117 14.15892 -12.81 -12.80 -15.02 1.774E-01 1.774E+02118 15.88656 -11.81 -11.80 -14.02 1.990E-01 1.990E+02119 17.82502 -10.81 -10.80 -13.02 2.233E-01 2.233E+02120 20 -9.81 -9.80 -12.02 2.506E-01 2.506E+02121 22.44037 -8.81 -8.80 -11.02 2.811E-01 2.811E+02122 25.17851 -7.81 -7.80 -10.02 3.154E-01 3.154E+02123 28.25075 -6.81 -6.80 -9.02 3.539E-01 3.539E+02124 31.69786 -5.81 -5.80 -8.02 3.971E-01 3.971E+02125 35.56559 -4.81 -4.80 -7.02 4.456E-01 4.456E+02126 39.90525 -3.81 -3.80 -6.02 4.999E-01 4.999E+02127 44.77442 -2.81 -2.80 -5.02 5.609E-01 5.609E+02128 50.23773 -1.81 -1.80 -4.02 6.294E-01 6.294E+02129 56.36766 -0.81 -0.80 -3.02 7.062E-01 7.062E+02130 63.24555 0.19 0.20 -2.02 7.924E-01 7.924E+02131 70.96268 1.19 1.20 -1.02 8.890E-01 8.890E+02132 79.62143 2.19 2.20 -0.02 9.975E-01 9.975E+02

133 89.33672 3.19 3.20 0.98 1.119E+00 1.119E+03134 100.2374 4.19 4.20 1.98 1.256E+00 1.256E+03135 112.4683 5.19 5.20 2.98 1.409E+00 1.409E+03136 126.1915 6.19 6.20 3.98 1.581E+00 1.581E+03137 141.5892 7.19 7.20 4.98 1.774E+00 1.774E+03138 158.8656 8.19 8.20 5.98 1.990E+00 1.990E+03139 178.2502 9.19 9.20 6.98 2.233E+00 2.233E+03140 200 10.19 10.20 7.98 2.506E+00 2.506E+03

Vp mVp Vp-p mVp-p3.543E-07 3.543E-04 7.086E-07 7.086E-043.975E-07 3.975E-04 7.951E-07 7.951E-044.460E-07 4.460E-04 8.921E-07 8.921E-045.005E-07 5.005E-04 1.001E-06 1.001E-035.615E-07 5.615E-04 1.123E-06 1.123E-036.300E-07 6.300E-04 1.260E-06 1.260E-037.069E-07 7.069E-04 1.414E-06 1.414E-037.932E-07 7.932E-04 1.586E-06 1.586E-038.900E-07 8.900E-04 1.780E-06 1.780E-039.985E-07 9.985E-04 1.997E-06 1.997E-031.120E-06 1.120E-03 2.241E-06 2.241E-031.257E-06 1.257E-03 2.514E-06 2.514E-031.410E-06 1.410E-03 2.821E-06 2.821E-031.583E-06 1.583E-03 3.165E-06 3.165E-031.776E-06 1.776E-03 3.551E-06 3.551E-031.992E-06 1.992E-03 3.985E-06 3.985E-032.235E-06 2.235E-03 4.471E-06 4.471E-032.508E-06 2.508E-03 5.016E-06 5.016E-032.814E-06 2.814E-03 5.629E-06 5.629E-033.158E-06 3.158E-03 6.315E-06 6.315E-033.543E-06 3.543E-03 7.086E-06 7.086E-033.975E-06 3.975E-03 7.951E-06 7.951E-034.460E-06 4.460E-03 8.921E-06 8.921E-035.005E-06 5.005E-03 1.001E-05 1.001E-025.615E-06 5.615E-03 1.123E-05 1.123E-026.300E-06 6.300E-03 1.260E-05 1.260E-027.069E-06 7.069E-03 1.414E-05 1.414E-027.932E-06 7.932E-03 1.586E-05 1.586E-028.900E-06 8.900E-03 1.780E-05 1.780E-029.985E-06 9.985E-03 1.997E-05 1.997E-021.120E-05 1.120E-02 2.241E-05 2.241E-021.257E-05 1.257E-02 2.514E-05 2.514E-021.410E-05 1.410E-02 2.821E-05 2.821E-02

Instructions for use:

* Enter values in cells B1, B5, and B9 ONLY (if you want to go in and protect all but those cells, feel free to do so). Here is what those cells control:

* Cell B1 is the commonly-stated microphone sensitivity on many data sheets. Enter the microphone of interest's sensitivity on that line.Once you enter the value in cell B1 then the microphone's sensitivity is returned in both Volts / Pascal (V/Pa) and millivolts / Pascal in cells B2 and B3 respectively. NOTE: Cell B2 is used as part of the table of calculations below - don't mess with it.

* Cell B5 is a variation on the calcs made using cell B2. I put it in as a sort of cross-check. Its calculations are not used in the tabular summary below. Again, it's just a check, but what it does do is allow you to enter the microphone sensitivity in mV/Pa (a common spec for a certain classification of mics) and return the older but possibly more familiar 'dB re 1 V @ 1 Pa' figure.

* Cell B9 is the maximum SPL you are anticipating (you enter the value). The cells immediately below return calculations for the pressure (Pa) as well as voltage )RMS) that corresponds, as well as the associated dBU, dBV, and dBM values - again, this is based on the value entered in cell B1. The table calculates (based on dB) the equivalent pressure, and based on mic sensitivity, the voltage (as well as dBu, dBm, and dBV) for a given SPL. Thus, if you need a quick path to the dBu value to expect, just enter the appropriate value in cell B1 and look for the max SPL on the table.

Spreadsheet written by Mark A. Jay. Questions or comments should be directed to him at mark@immersifi.com or contact him via skype (mark.a.jay). May 8, 2010 (MAJ)

1.583E-05 1.583E-02 3.165E-05 3.165E-021.776E-05 1.776E-02 3.551E-05 3.551E-021.992E-05 1.992E-02 3.985E-05 3.985E-022.235E-05 2.235E-02 4.471E-05 4.471E-022.508E-05 2.508E-02 5.016E-05 5.016E-022.814E-05 2.814E-02 5.629E-05 5.629E-023.158E-05 3.158E-02 6.315E-05 6.315E-023.543E-05 3.543E-02 7.086E-05 7.086E-023.975E-05 3.975E-02 7.951E-05 7.951E-024.460E-05 4.460E-02 8.921E-05 8.921E-025.005E-05 5.005E-02 1.001E-04 1.001E-015.615E-05 5.615E-02 1.123E-04 1.123E-016.300E-05 6.300E-02 1.260E-04 1.260E-017.069E-05 7.069E-02 1.414E-04 1.414E-017.932E-05 7.932E-02 1.586E-04 1.586E-018.900E-05 8.900E-02 1.780E-04 1.780E-019.985E-05 9.985E-02 1.997E-04 1.997E-011.120E-04 1.120E-01 2.241E-04 2.241E-011.257E-04 1.257E-01 2.514E-04 2.514E-011.410E-04 1.410E-01 2.821E-04 2.821E-011.583E-04 1.583E-01 3.165E-04 3.165E-011.776E-04 1.776E-01 3.551E-04 3.551E-011.992E-04 1.992E-01 3.985E-04 3.985E-012.235E-04 2.235E-01 4.471E-04 4.471E-012.508E-04 2.508E-01 5.016E-04 5.016E-012.814E-04 2.814E-01 5.629E-04 5.629E-013.158E-04 3.158E-01 6.315E-04 6.315E-013.543E-04 3.543E-01 7.086E-04 7.086E-013.975E-04 3.975E-01 7.951E-04 7.951E-014.460E-04 4.460E-01 8.921E-04 8.921E-015.005E-04 5.005E-01 1.001E-03 1.001E+005.615E-04 5.615E-01 1.123E-03 1.123E+006.300E-04 6.300E-01 1.260E-03 1.260E+007.069E-04 7.069E-01 1.414E-03 1.414E+007.932E-04 7.932E-01 1.586E-03 1.586E+008.900E-04 8.900E-01 1.780E-03 1.780E+009.985E-04 9.985E-01 1.997E-03 1.997E+001.120E-03 1.120E+00 2.241E-03 2.241E+001.257E-03 1.257E+00 2.514E-03 2.514E+001.410E-03 1.410E+00 2.821E-03 2.821E+001.583E-03 1.583E+00 3.165E-03 3.165E+001.776E-03 1.776E+00 3.551E-03 3.551E+001.992E-03 1.992E+00 3.985E-03 3.985E+002.235E-03 2.235E+00 4.471E-03 4.471E+002.508E-03 2.508E+00 5.016E-03 5.016E+002.814E-03 2.814E+00 5.629E-03 5.629E+003.158E-03 3.158E+00 6.315E-03 6.315E+003.543E-03 3.543E+00 7.086E-03 7.086E+003.975E-03 3.975E+00 7.951E-03 7.951E+004.460E-03 4.460E+00 8.921E-03 8.921E+00

5.005E-03 5.005E+00 1.001E-02 1.001E+015.615E-03 5.615E+00 1.123E-02 1.123E+016.300E-03 6.300E+00 1.260E-02 1.260E+017.069E-03 7.069E+00 1.414E-02 1.414E+017.932E-03 7.932E+00 1.586E-02 1.586E+018.900E-03 8.900E+00 1.780E-02 1.780E+019.985E-03 9.985E+00 1.997E-02 1.997E+011.120E-02 1.120E+01 2.241E-02 2.241E+011.257E-02 1.257E+01 2.514E-02 2.514E+011.410E-02 1.410E+01 2.821E-02 2.821E+011.583E-02 1.583E+01 3.165E-02 3.165E+011.776E-02 1.776E+01 3.551E-02 3.551E+011.992E-02 1.992E+01 3.985E-02 3.985E+012.235E-02 2.235E+01 4.471E-02 4.471E+012.508E-02 2.508E+01 5.016E-02 5.016E+012.814E-02 2.814E+01 5.629E-02 5.629E+013.158E-02 3.158E+01 6.315E-02 6.315E+013.543E-02 3.543E+01 7.086E-02 7.086E+013.975E-02 3.975E+01 7.951E-02 7.951E+014.460E-02 4.460E+01 8.921E-02 8.921E+015.005E-02 5.005E+01 1.001E-01 1.001E+025.615E-02 5.615E+01 1.123E-01 1.123E+026.300E-02 6.300E+01 1.260E-01 1.260E+027.069E-02 7.069E+01 1.414E-01 1.414E+027.932E-02 7.932E+01 1.586E-01 1.586E+028.900E-02 8.900E+01 1.780E-01 1.780E+029.985E-02 9.985E+01 1.997E-01 1.997E+021.120E-01 1.120E+02 2.241E-01 2.241E+021.257E-01 1.257E+02 2.514E-01 2.514E+021.410E-01 1.410E+02 2.821E-01 2.821E+021.583E-01 1.583E+02 3.165E-01 3.165E+021.776E-01 1.776E+02 3.551E-01 3.551E+021.992E-01 1.992E+02 3.985E-01 3.985E+022.235E-01 2.235E+02 4.471E-01 4.471E+022.508E-01 2.508E+02 5.016E-01 5.016E+022.814E-01 2.814E+02 5.629E-01 5.629E+023.158E-01 3.158E+02 6.315E-01 6.315E+023.543E-01 3.543E+02 7.086E-01 7.086E+023.975E-01 3.975E+02 7.951E-01 7.951E+024.460E-01 4.460E+02 8.921E-01 8.921E+025.005E-01 5.005E+02 1.001E+00 1.001E+035.615E-01 5.615E+02 1.123E+00 1.123E+036.300E-01 6.300E+02 1.260E+00 1.260E+037.069E-01 7.069E+02 1.414E+00 1.414E+037.932E-01 7.932E+02 1.586E+00 1.586E+038.900E-01 8.900E+02 1.780E+00 1.780E+039.985E-01 9.985E+02 1.997E+00 1.997E+031.120E+00 1.120E+03 2.241E+00 2.241E+031.257E+00 1.257E+03 2.514E+00 2.514E+031.410E+00 1.410E+03 2.821E+00 2.821E+03

1.583E+00 1.583E+03 3.165E+00 3.165E+031.776E+00 1.776E+03 3.551E+00 3.551E+031.992E+00 1.992E+03 3.985E+00 3.985E+032.235E+00 2.235E+03 4.471E+00 4.471E+032.508E+00 2.508E+03 5.016E+00 5.016E+032.814E+00 2.814E+03 5.629E+00 5.629E+033.158E+00 3.158E+03 6.315E+00 6.315E+033.543E+00 3.543E+03 7.086E+00 7.086E+03

Instructions for use:

* Enter values in cells B1, B5, and B9 ONLY (if you want to go in and protect all but those cells, feel free to do so). Here is what those cells control:

* Cell B1 is the commonly-stated microphone sensitivity on many data sheets. Enter the microphone of interest's sensitivity on that line.Once you enter the value in cell B1 then the microphone's sensitivity is returned in both Volts / Pascal (V/Pa) and millivolts / Pascal in cells B2 and B3 respectively. NOTE: Cell B2 is used as part of the table of calculations below - don't mess with it.

* Cell B5 is a variation on the calcs made using cell B2. I put it in as a sort of cross-check. Its calculations are not used in the tabular summary below. Again, it's just a check, but what it does do is allow you to enter the microphone sensitivity in mV/Pa (a common spec for a certain classification of mics) and return the older but possibly more familiar 'dB re 1 V @ 1 Pa' figure.

* Cell B9 is the maximum SPL you are anticipating (you enter the value). The cells immediately below return calculations for the pressure (Pa) as well as voltage )RMS) that corresponds, as well as the associated dBU, dBV, and dBM values - again, this is based on the value entered in cell B1. The table calculates (based on dB) the equivalent pressure, and based on mic sensitivity, the voltage (as well as dBu, dBm, and dBV) for a given SPL. Thus, if you need a quick path to the dBu value to expect, just enter the appropriate value in cell B1 and look for the max SPL on the table.

Spreadsheet written by Mark A. Jay. Questions or comments should be directed to him at mark@immersifi.com or contact him via skype (mark.a.jay). May 8, 2010 (MAJ)

dB Re 1V (ENTER ->) -38.0= V/Pa 0.012528= mV/Pa 12.52818- or, another way -= mV/Pa (ENTER ->) 12.82= V/Pa 0.0128= dB re 1V -37.84

Max SPL? (ENTER ->) 120= Pa? 20= Max V? 0.250564= Max mV? 250.5636= dBu? -9.807673= dBV? -12.02164= dBm? -9.803152

SPL, dB Re 20E-6 Pa Pa, RMS dBu dBm dBV V RMS mV RMS0 0.00002 -129.81 -129.80 -132.02 2.506E-07 2.506E-041 2.24E-05 -128.81 -128.80 -131.02 2.811E-07 2.811E-042 2.52E-05 -127.81 -127.80 -130.02 3.154E-07 3.154E-043 2.83E-05 -126.81 -126.80 -129.02 3.539E-07 3.539E-044 3.17E-05 -125.81 -125.80 -128.02 3.971E-07 3.971E-045 3.56E-05 -124.81 -124.80 -127.02 4.456E-07 4.456E-046 3.99E-05 -123.81 -123.80 -126.02 4.999E-07 4.999E-047 4.48E-05 -122.81 -122.80 -125.02 5.609E-07 5.609E-048 5.02E-05 -121.81 -121.80 -124.02 6.294E-07 6.294E-049 5.64E-05 -120.81 -120.80 -123.02 7.062E-07 7.062E-04

10 6.32E-05 -119.81 -119.80 -122.02 7.924E-07 7.924E-0411 7.1E-05 -118.81 -118.80 -121.02 8.890E-07 8.890E-0412 7.96E-05 -117.81 -117.80 -120.02 9.975E-07 9.975E-0413 8.93E-05 -116.81 -116.80 -119.02 1.119E-06 1.119E-0314 0.0001 -115.81 -115.80 -118.02 1.256E-06 1.256E-0315 0.000112 -114.81 -114.80 -117.02 1.409E-06 1.409E-0316 0.000126 -113.81 -113.80 -116.02 1.581E-06 1.581E-0317 0.000142 -112.81 -112.80 -115.02 1.774E-06 1.774E-0318 0.000159 -111.81 -111.80 -114.02 1.990E-06 1.990E-0319 0.000178 -110.81 -110.80 -113.02 2.233E-06 2.233E-0320 0.0002 -109.81 -109.80 -112.02 2.506E-06 2.506E-0321 0.000224 -108.81 -108.80 -111.02 2.811E-06 2.811E-0322 0.000252 -107.81 -107.80 -110.02 3.154E-06 3.154E-0323 0.000283 -106.81 -106.80 -109.02 3.539E-06 3.539E-0324 0.000317 -105.81 -105.80 -108.02 3.971E-06 3.971E-0325 0.000356 -104.81 -104.80 -107.02 4.456E-06 4.456E-0326 0.000399 -103.81 -103.80 -106.02 4.999E-06 4.999E-0327 0.000448 -102.81 -102.80 -105.02 5.609E-06 5.609E-0328 0.000502 -101.81 -101.80 -104.02 6.294E-06 6.294E-0329 0.000564 -100.81 -100.80 -103.02 7.062E-06 7.062E-0330 0.000632 -99.81 -99.80 -102.02 7.924E-06 7.924E-0331 0.00071 -98.81 -98.80 -101.02 8.890E-06 8.890E-0332 0.000796 -97.81 -97.80 -100.02 9.975E-06 9.975E-03

33 0.000893 -96.81 -96.80 -99.02 1.119E-05 1.119E-0234 0.001002 -95.81 -95.80 -98.02 1.256E-05 1.256E-0235 0.001125 -94.81 -94.80 -97.02 1.409E-05 1.409E-0236 0.001262 -93.81 -93.80 -96.02 1.581E-05 1.581E-0237 0.001416 -92.81 -92.80 -95.02 1.774E-05 1.774E-0238 0.001589 -91.81 -91.80 -94.02 1.990E-05 1.990E-0239 0.001783 -90.81 -90.80 -93.02 2.233E-05 2.233E-0240 0.002 -89.81 -89.80 -92.02 2.506E-05 2.506E-0241 0.002244 -88.81 -88.80 -91.02 2.811E-05 2.811E-0242 0.002518 -87.81 -87.80 -90.02 3.154E-05 3.154E-0243 0.002825 -86.81 -86.80 -89.02 3.539E-05 3.539E-0244 0.00317 -85.81 -85.80 -88.02 3.971E-05 3.971E-0245 0.003557 -84.81 -84.80 -87.02 4.456E-05 4.456E-0246 0.003991 -83.81 -83.80 -86.02 4.999E-05 4.999E-0247 0.004477 -82.81 -82.80 -85.02 5.609E-05 5.609E-0248 0.005024 -81.81 -81.80 -84.02 6.294E-05 6.294E-0249 0.005637 -80.81 -80.80 -83.02 7.062E-05 7.062E-0250 0.006325 -79.81 -79.80 -82.02 7.924E-05 7.924E-0251 0.007096 -78.81 -78.80 -81.02 8.890E-05 8.890E-0252 0.007962 -77.81 -77.80 -80.02 9.975E-05 9.975E-0253 0.008934 -76.81 -76.80 -79.02 1.119E-04 1.119E-0154 0.010024 -75.81 -75.80 -78.02 1.256E-04 1.256E-0155 0.011247 -74.81 -74.80 -77.02 1.409E-04 1.409E-0156 0.012619 -73.81 -73.80 -76.02 1.581E-04 1.581E-0157 0.014159 -72.81 -72.80 -75.02 1.774E-04 1.774E-0158 0.015887 -71.81 -71.80 -74.02 1.990E-04 1.990E-0159 0.017825 -70.81 -70.80 -73.02 2.233E-04 2.233E-0160 0.02 -69.81 -69.80 -72.02 2.506E-04 2.506E-0161 0.02244 -68.81 -68.80 -71.02 2.811E-04 2.811E-0162 0.025179 -67.81 -67.80 -70.02 3.154E-04 3.154E-0163 0.028251 -66.81 -66.80 -69.02 3.539E-04 3.539E-0164 0.031698 -65.81 -65.80 -68.02 3.971E-04 3.971E-0165 0.035566 -64.81 -64.80 -67.02 4.456E-04 4.456E-0166 0.039905 -63.81 -63.80 -66.02 4.999E-04 4.999E-0167 0.044774 -62.81 -62.80 -65.02 5.609E-04 5.609E-0168 0.050238 -61.81 -61.80 -64.02 6.294E-04 6.294E-0169 0.056368 -60.81 -60.80 -63.02 7.062E-04 7.062E-0170 0.063246 -59.81 -59.80 -62.02 7.924E-04 7.924E-0171 0.070963 -58.81 -58.80 -61.02 8.890E-04 8.890E-0172 0.079621 -57.81 -57.80 -60.02 9.975E-04 9.975E-0173 0.089337 -56.81 -56.80 -59.02 1.119E-03 1.119E+0074 0.100237 -55.81 -55.80 -58.02 1.256E-03 1.256E+0075 0.112468 -54.81 -54.80 -57.02 1.409E-03 1.409E+0076 0.126191 -53.81 -53.80 -56.02 1.581E-03 1.581E+0077 0.141589 -52.81 -52.80 -55.02 1.774E-03 1.774E+0078 0.158866 -51.81 -51.80 -54.02 1.990E-03 1.990E+0079 0.17825 -50.81 -50.80 -53.02 2.233E-03 2.233E+0080 0.2 -49.81 -49.80 -52.02 2.506E-03 2.506E+0081 0.224404 -48.81 -48.80 -51.02 2.811E-03 2.811E+0082 0.251785 -47.81 -47.80 -50.02 3.154E-03 3.154E+00

83 0.282508 -46.81 -46.80 -49.02 3.539E-03 3.539E+0084 0.316979 -45.81 -45.80 -48.02 3.971E-03 3.971E+0085 0.355656 -44.81 -44.80 -47.02 4.456E-03 4.456E+0086 0.399052 -43.81 -43.80 -46.02 4.999E-03 4.999E+0087 0.447744 -42.81 -42.80 -45.02 5.609E-03 5.609E+0088 0.502377 -41.81 -41.80 -44.02 6.294E-03 6.294E+0089 0.563677 -40.81 -40.80 -43.02 7.062E-03 7.062E+0090 0.632456 -39.81 -39.80 -42.02 7.924E-03 7.924E+0091 0.709627 -38.81 -38.80 -41.02 8.890E-03 8.890E+0092 0.796214 -37.81 -37.80 -40.02 9.975E-03 9.975E+0093 0.893367 -36.81 -36.80 -39.02 1.119E-02 1.119E+0194 1.002374 -35.81 -35.80 -38.02 1.256E-02 1.256E+0195 1.124683 -34.81 -34.80 -37.02 1.409E-02 1.409E+0196 1.261915 -33.81 -33.80 -36.02 1.581E-02 1.581E+0197 1.415892 -32.81 -32.80 -35.02 1.774E-02 1.774E+0198 1.588656 -31.81 -31.80 -34.02 1.990E-02 1.990E+0199 1.782502 -30.81 -30.80 -33.02 2.233E-02 2.233E+01

100 2 -29.81 -29.80 -32.02 2.506E-02 2.506E+01101 2.244037 -28.81 -28.80 -31.02 2.811E-02 2.811E+01102 2.517851 -27.81 -27.80 -30.02 3.154E-02 3.154E+01103 2.825075 -26.81 -26.80 -29.02 3.539E-02 3.539E+01104 3.169786 -25.81 -25.80 -28.02 3.971E-02 3.971E+01105 3.556559 -24.81 -24.80 -27.02 4.456E-02 4.456E+01106 3.990525 -23.81 -23.80 -26.02 4.999E-02 4.999E+01107 4.477442 -22.81 -22.80 -25.02 5.609E-02 5.609E+01108 5.023773 -21.81 -21.80 -24.02 6.294E-02 6.294E+01109 5.636766 -20.81 -20.80 -23.02 7.062E-02 7.062E+01110 6.324555 -19.81 -19.80 -22.02 7.924E-02 7.924E+01111 7.096268 -18.81 -18.80 -21.02 8.890E-02 8.890E+01112 7.962143 -17.81 -17.80 -20.02 9.975E-02 9.975E+01113 8.933672 -16.81 -16.80 -19.02 1.119E-01 1.119E+02114 10.02374 -15.81 -15.80 -18.02 1.256E-01 1.256E+02115 11.24683 -14.81 -14.80 -17.02 1.409E-01 1.409E+02116 12.61915 -13.81 -13.80 -16.02 1.581E-01 1.581E+02117 14.15892 -12.81 -12.80 -15.02 1.774E-01 1.774E+02118 15.88656 -11.81 -11.80 -14.02 1.990E-01 1.990E+02119 17.82502 -10.81 -10.80 -13.02 2.233E-01 2.233E+02120 20 -9.81 -9.80 -12.02 2.506E-01 2.506E+02121 22.44037 -8.81 -8.80 -11.02 2.811E-01 2.811E+02122 25.17851 -7.81 -7.80 -10.02 3.154E-01 3.154E+02123 28.25075 -6.81 -6.80 -9.02 3.539E-01 3.539E+02124 31.69786 -5.81 -5.80 -8.02 3.971E-01 3.971E+02125 35.56559 -4.81 -4.80 -7.02 4.456E-01 4.456E+02126 39.90525 -3.81 -3.80 -6.02 4.999E-01 4.999E+02127 44.77442 -2.81 -2.80 -5.02 5.609E-01 5.609E+02128 50.23773 -1.81 -1.80 -4.02 6.294E-01 6.294E+02129 56.36766 -0.81 -0.80 -3.02 7.062E-01 7.062E+02130 63.24555 0.19 0.20 -2.02 7.924E-01 7.924E+02131 70.96268 1.19 1.20 -1.02 8.890E-01 8.890E+02132 79.62143 2.19 2.20 -0.02 9.975E-01 9.975E+02

133 89.33672 3.19 3.20 0.98 1.119E+00 1.119E+03134 100.2374 4.19 4.20 1.98 1.256E+00 1.256E+03135 112.4683 5.19 5.20 2.98 1.409E+00 1.409E+03136 126.1915 6.19 6.20 3.98 1.581E+00 1.581E+03137 141.5892 7.19 7.20 4.98 1.774E+00 1.774E+03138 158.8656 8.19 8.20 5.98 1.990E+00 1.990E+03139 178.2502 9.19 9.20 6.98 2.233E+00 2.233E+03140 200 10.19 10.20 7.98 2.506E+00 2.506E+03

Amp O/p Sensitivity -> 0.01

Vp mVp Vp-p mVp-p dBV Out3.543E-07 3.543E-04 7.086E-07 7.086E-04 -92.023.975E-07 3.975E-04 7.951E-07 7.951E-04 -91.024.460E-07 4.460E-04 8.921E-07 8.921E-04 -90.025.005E-07 5.005E-04 1.001E-06 1.001E-03 -89.025.615E-07 5.615E-04 1.123E-06 1.123E-03 -88.026.300E-07 6.300E-04 1.260E-06 1.260E-03 -87.027.069E-07 7.069E-04 1.414E-06 1.414E-03 -86.027.932E-07 7.932E-04 1.586E-06 1.586E-03 -85.028.900E-07 8.900E-04 1.780E-06 1.780E-03 -84.029.985E-07 9.985E-04 1.997E-06 1.997E-03 -83.021.120E-06 1.120E-03 2.241E-06 2.241E-03 -82.021.257E-06 1.257E-03 2.514E-06 2.514E-03 -81.021.410E-06 1.410E-03 2.821E-06 2.821E-03 -80.021.583E-06 1.583E-03 3.165E-06 3.165E-03 -79.021.776E-06 1.776E-03 3.551E-06 3.551E-03 -78.021.992E-06 1.992E-03 3.985E-06 3.985E-03 -77.022.235E-06 2.235E-03 4.471E-06 4.471E-03 -76.022.508E-06 2.508E-03 5.016E-06 5.016E-03 -75.022.814E-06 2.814E-03 5.629E-06 5.629E-03 -74.023.158E-06 3.158E-03 6.315E-06 6.315E-03 -73.023.543E-06 3.543E-03 7.086E-06 7.086E-03 -72.023.975E-06 3.975E-03 7.951E-06 7.951E-03 -71.024.460E-06 4.460E-03 8.921E-06 8.921E-03 -70.025.005E-06 5.005E-03 1.001E-05 1.001E-02 -69.025.615E-06 5.615E-03 1.123E-05 1.123E-02 -68.026.300E-06 6.300E-03 1.260E-05 1.260E-02 -67.027.069E-06 7.069E-03 1.414E-05 1.414E-02 -66.027.932E-06 7.932E-03 1.586E-05 1.586E-02 -65.028.900E-06 8.900E-03 1.780E-05 1.780E-02 -64.029.985E-06 9.985E-03 1.997E-05 1.997E-02 -63.021.120E-05 1.120E-02 2.241E-05 2.241E-02 -62.021.257E-05 1.257E-02 2.514E-05 2.514E-02 -61.021.410E-05 1.410E-02 2.821E-05 2.821E-02 -60.02

1.583E-05 1.583E-02 3.165E-05 3.165E-02 -59.021.776E-05 1.776E-02 3.551E-05 3.551E-02 -58.021.992E-05 1.992E-02 3.985E-05 3.985E-02 -57.022.235E-05 2.235E-02 4.471E-05 4.471E-02 -56.022.508E-05 2.508E-02 5.016E-05 5.016E-02 -55.022.814E-05 2.814E-02 5.629E-05 5.629E-02 -54.023.158E-05 3.158E-02 6.315E-05 6.315E-02 -53.023.543E-05 3.543E-02 7.086E-05 7.086E-02 -52.023.975E-05 3.975E-02 7.951E-05 7.951E-02 -51.024.460E-05 4.460E-02 8.921E-05 8.921E-02 -50.025.005E-05 5.005E-02 1.001E-04 1.001E-01 -49.025.615E-05 5.615E-02 1.123E-04 1.123E-01 -48.026.300E-05 6.300E-02 1.260E-04 1.260E-01 -47.027.069E-05 7.069E-02 1.414E-04 1.414E-01 -46.027.932E-05 7.932E-02 1.586E-04 1.586E-01 -45.028.900E-05 8.900E-02 1.780E-04 1.780E-01 -44.029.985E-05 9.985E-02 1.997E-04 1.997E-01 -43.021.120E-04 1.120E-01 2.241E-04 2.241E-01 -42.021.257E-04 1.257E-01 2.514E-04 2.514E-01 -41.021.410E-04 1.410E-01 2.821E-04 2.821E-01 -40.021.583E-04 1.583E-01 3.165E-04 3.165E-01 -39.021.776E-04 1.776E-01 3.551E-04 3.551E-01 -38.021.992E-04 1.992E-01 3.985E-04 3.985E-01 -37.022.235E-04 2.235E-01 4.471E-04 4.471E-01 -36.022.508E-04 2.508E-01 5.016E-04 5.016E-01 -35.022.814E-04 2.814E-01 5.629E-04 5.629E-01 -34.023.158E-04 3.158E-01 6.315E-04 6.315E-01 -33.023.543E-04 3.543E-01 7.086E-04 7.086E-01 -32.023.975E-04 3.975E-01 7.951E-04 7.951E-01 -31.024.460E-04 4.460E-01 8.921E-04 8.921E-01 -30.025.005E-04 5.005E-01 1.001E-03 1.001E+00 -29.025.615E-04 5.615E-01 1.123E-03 1.123E+00 -28.026.300E-04 6.300E-01 1.260E-03 1.260E+00 -27.027.069E-04 7.069E-01 1.414E-03 1.414E+00 -26.027.932E-04 7.932E-01 1.586E-03 1.586E+00 -25.028.900E-04 8.900E-01 1.780E-03 1.780E+00 -24.029.985E-04 9.985E-01 1.997E-03 1.997E+00 -23.021.120E-03 1.120E+00 2.241E-03 2.241E+00 -22.021.257E-03 1.257E+00 2.514E-03 2.514E+00 -21.021.410E-03 1.410E+00 2.821E-03 2.821E+00 -20.021.583E-03 1.583E+00 3.165E-03 3.165E+00 -19.021.776E-03 1.776E+00 3.551E-03 3.551E+00 -18.021.992E-03 1.992E+00 3.985E-03 3.985E+00 -17.022.235E-03 2.235E+00 4.471E-03 4.471E+00 -16.022.508E-03 2.508E+00 5.016E-03 5.016E+00 -15.022.814E-03 2.814E+00 5.629E-03 5.629E+00 -14.023.158E-03 3.158E+00 6.315E-03 6.315E+00 -13.023.543E-03 3.543E+00 7.086E-03 7.086E+00 -12.023.975E-03 3.975E+00 7.951E-03 7.951E+00 -11.024.460E-03 4.460E+00 8.921E-03 8.921E+00 -10.02

5.005E-03 5.005E+00 1.001E-02 1.001E+01 -9.025.615E-03 5.615E+00 1.123E-02 1.123E+01 -8.026.300E-03 6.300E+00 1.260E-02 1.260E+01 -7.027.069E-03 7.069E+00 1.414E-02 1.414E+01 -6.027.932E-03 7.932E+00 1.586E-02 1.586E+01 -5.028.900E-03 8.900E+00 1.780E-02 1.780E+01 -4.029.985E-03 9.985E+00 1.997E-02 1.997E+01 -3.021.120E-02 1.120E+01 2.241E-02 2.241E+01 -2.021.257E-02 1.257E+01 2.514E-02 2.514E+01 -1.021.410E-02 1.410E+01 2.821E-02 2.821E+01 -0.021.583E-02 1.583E+01 3.165E-02 3.165E+01 0.981.776E-02 1.776E+01 3.551E-02 3.551E+01 1.981.992E-02 1.992E+01 3.985E-02 3.985E+01 2.982.235E-02 2.235E+01 4.471E-02 4.471E+01 3.982.508E-02 2.508E+01 5.016E-02 5.016E+01 4.982.814E-02 2.814E+01 5.629E-02 5.629E+01 5.983.158E-02 3.158E+01 6.315E-02 6.315E+01 6.983.543E-02 3.543E+01 7.086E-02 7.086E+01 7.983.975E-02 3.975E+01 7.951E-02 7.951E+01 8.984.460E-02 4.460E+01 8.921E-02 8.921E+01 9.985.005E-02 5.005E+01 1.001E-01 1.001E+02 10.985.615E-02 5.615E+01 1.123E-01 1.123E+02 11.986.300E-02 6.300E+01 1.260E-01 1.260E+02 12.987.069E-02 7.069E+01 1.414E-01 1.414E+02 13.987.932E-02 7.932E+01 1.586E-01 1.586E+02 14.988.900E-02 8.900E+01 1.780E-01 1.780E+02 15.989.985E-02 9.985E+01 1.997E-01 1.997E+02 16.981.120E-01 1.120E+02 2.241E-01 2.241E+02 17.981.257E-01 1.257E+02 2.514E-01 2.514E+02 18.981.410E-01 1.410E+02 2.821E-01 2.821E+02 19.981.583E-01 1.583E+02 3.165E-01 3.165E+02 20.981.776E-01 1.776E+02 3.551E-01 3.551E+02 21.981.992E-01 1.992E+02 3.985E-01 3.985E+02 22.982.235E-01 2.235E+02 4.471E-01 4.471E+02 23.982.508E-01 2.508E+02 5.016E-01 5.016E+02 24.982.814E-01 2.814E+02 5.629E-01 5.629E+02 25.983.158E-01 3.158E+02 6.315E-01 6.315E+02 26.983.543E-01 3.543E+02 7.086E-01 7.086E+02 27.983.975E-01 3.975E+02 7.951E-01 7.951E+02 28.984.460E-01 4.460E+02 8.921E-01 8.921E+02 29.985.005E-01 5.005E+02 1.001E+00 1.001E+03 30.985.615E-01 5.615E+02 1.123E+00 1.123E+03 31.986.300E-01 6.300E+02 1.260E+00 1.260E+03 32.987.069E-01 7.069E+02 1.414E+00 1.414E+03 33.987.932E-01 7.932E+02 1.586E+00 1.586E+03 34.988.900E-01 8.900E+02 1.780E+00 1.780E+03 35.989.985E-01 9.985E+02 1.997E+00 1.997E+03 36.981.120E+00 1.120E+03 2.241E+00 2.241E+03 37.981.257E+00 1.257E+03 2.514E+00 2.514E+03 38.981.410E+00 1.410E+03 2.821E+00 2.821E+03 39.98

1.583E+00 1.583E+03 3.165E+00 3.165E+03 40.981.776E+00 1.776E+03 3.551E+00 3.551E+03 41.981.992E+00 1.992E+03 3.985E+00 3.985E+03 42.982.235E+00 2.235E+03 4.471E+00 4.471E+03 43.982.508E+00 2.508E+03 5.016E+00 5.016E+03 44.982.814E+00 2.814E+03 5.629E+00 5.629E+03 45.983.158E+00 3.158E+03 6.315E+00 6.315E+03 46.983.543E+00 3.543E+03 7.086E+00 7.086E+03 47.98