subjective attributes of sound acoustics of concert halls and rooms science of sound, chapters 5,6,7...
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SUBJECTIVE ATTRIBUTES OF SOUND
Acoustics of Concert Halls and Rooms
Science of Sound, Chapters 5,6,7
Loudness, Timbre
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FOUR ATTRIBUTES USED TO DESCRIBE A SOUND:
•Loudness•Pitch•Timbre•Duration
EACH OF THESE DEPENDS ON ONE OR MORE PHYSICAL PARAMETERS THAT CAN BE MEASURED:
•Sound pressure•Frequency•Spectrum•Duration (measured) •Envelope
Relating the SUBJECTIVE QUALITIES to the PHYSICAL PARAMETERS that we can MEASURE OBJECTIVELYIs an important problem in PSYCHOACOUSTICS
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DEPENDENCE OF SUBJECTIVE QUALITIES OF SOUND ON PHYSICAL PARAMETERS
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LOUDNESS LEVEL
Contours of equal loudness are labeled phons At 1000 Hz, Loudness Level = Lp
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SOUND LEVEL METER
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PLOT YOUR OWN FREQUENCY RESPONSE
ASSIGNMENT: Plot your own frequency response curves by using
www.phys.unsw.edu.au/~jw/hearing.html
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HOW DOES LOUDNESS DEPEND ON
FREQUENCY?
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LOUDNESS SCALING
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LOUDNESS OF COMPLEX TONES: CRITICAL BANDS
Loudness depends mainly on SOUND PRESSURE.
but it also depends on FREQUENCY, SPECTRUM and DURATION
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DEPENDENCE OF LOUDNESS
ON BANDWIDTH
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LOUDNESS OF COMBINED SOUNDS
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RANGE OF FREQUENCY AND INTENSITY OF THE EAR
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MUSICAL DYNAMICS AND LOUDNESS
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HOW DOES LOUDNESS DEPEND ON
PARTIAL MASKING?
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HOW DOES LOUDNESS DEPEND ON DURATION?
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EFFECT OF TONE ENVELOPE ON TIMBRE
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EFFECT OF ENVELOPE ON TIMBRE
PIANO NOTES PLAYED FORWARD AND BACKWARD