unity 2 / v4.7.1 probe mic. (real-ear, coupler and … · end program session list connexx module...

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Confidential / Copyright © Siemens AG 2009. All righ ts reserved.

Unity 2 / v4.7.1

Vera Spitzlei, Corporate Audiology

Probe Mic. (Real-ear, Coupler and RECD Measurements) and Hearing Instrument Analyzer

Page 2 November 2009


H WS AU MB AVera Spitzlei, Corporate Audiology

UNITY™ 2

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� Objective evaluation

� InSitu-/or Coupler measurements to verify target gains� InSitu-/or Coupler measurements for fine tuning

� Semi-objective evaluation

� Aided Audiometry compared to unaided measurements� Speech Audiometry according to speech development

� Subjective evaluation / Validation

� Close monitoring of the patient‘s listening behavior� Questionnaires

Hearing Instrument Fitting: Verification Methods




� Objective evaluation

� InSitu-/or Coupler measurements to verify target gains� InSitu-/or Coupler measurements for fine tuning

� Semi-objective evaluation

� Aided Audiometry compared to unaided measurements� Speech Audiometry according to speech development

� Subjective evaluation / Validation

� Close monitoring of the Patient‘s listening behavior� Questionnaires

Hearing Instrument Fitting: Verification Methods

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During the fitting of hearing instruments, real-ear measurements and coupler measurements are used for the electro-acoustic verification of “aided“ situations (coupler measurements following calibration standards, e.g. ANSI S3.22 and DIN IEC 118-7).

During a hearing instrument fitting, they are used to

� Verify First Fit or fine tuning of hearing instruments

� Conduct fine tuning with uncooperative patients and children

� Document and compare the response curves of different hearing instruments (gain / output) according to specific input signals and signal levels

Why conduct Verification Measurements?




Anatomical terms

� Every ear canal has an individual shape and size!

� Coupler or ear simulator can only provide an estimate / approximation of the residual ear canal volume and resulting acoustics at the eardrum

� Esp. in children, auricle and ear canal are smaller, more straight and more narrow than in adults

� Resonance peaks are shifted towards higher frequencies

Why conduct Real-Ear Measurements?

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RECD according to age

-5

0

5

10

15

20

25

30

100 1000 10000

f[Hz]

L[dB

]

RECDd0t12(CXX) RECDd13t24(CXX) RECDd25t48(CXX)RECDd49t60(CXX) RECDd60andup(CXX)

REUG according to age

-5

0

5

10

15

20

25

30

100 1000 10000

f[Hz]

L[dB

]

REUG 0t4m REUG 9t14m REUG 14t24m REUG 24andup

With a smaller ear canal volume (e.g. children), resonance peaks are shifted to higher frequencies !





This might contribute to a

higher sound level at the

eardrum of probably

more than 20 dB!

Danger of over-amplification!

REIG gap@FOG50dB, related to adult values (>60 months)

-10

-5

0

5

10

15

20

25

100 1000 10000

f[Hz]

L[dB

]

3 months 12 months 24 months 36 months 48 months


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Start fromUnity

environment

Start fromNOAH module

Probe Microphone Measurements in Unity:Starting/Accessing the Module




Probe Microphone Measurements in Unity:Starting/Accessing the Module

In Noah, Unity 2 PC Probe in „On top mode“ can be left opened while using

any fitting software

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Probe Microphone Measurements in Unity: Start Screen (Unaided Measurement, OEG)




Probe Microphone Measurements in Unity:Toolbar

Client list

Save fitting

session

Change ear sides

SPL / Gain view

Unaided measurement

(Open ear gain)

Aided Measurement

(InSitu and coupler)

Insertion Gain

Input/Output

diagram

RECD

Sound Mapping

Probe tubecalibration

End program

Session list

Connexx module

Open Ear Spectrum

Print fitting

sessionOccluded

measurementOcclusion

effects

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Probe Microphone Measurements:General „Guidelines“

Preparation of the Measurement

In-Situ measurement

Recommended Stimuli for NAL-NL1 and DSL:ILTASS (non-modulated), Icra1 (non-modulated), Icra7 (modulated), ISTS

OEG measurement

REIG measurement

RECD measurement

Adaptation of Formula Configurations

Coupler measurement




Placement of the Client in front of the Loudspeaker :

� Patient facing loudspeaker or with 45°azimuth

� Fitted ear close to loudspeaker

� Patient should keep head in position during measurements

� Recommended distance between loudspeaker and ear:

� ~ ½-1 m (2 - 4 ft.)

The further the distance between the loudspeaker and the reference microphone, the louder the signal

Probe Microphone Measurements in Unity: Real-Ear Measurements

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Probe Microphone Measurements in Unity: Types of Real-Ear Measurements

� Unaided measurement (Open ear gain)

� Occluded measurement

� Aided Measurement (InSitu and coupler)

� Insertion Gain

� Input / Output diagram

� Open Ear Spectrum

� Occlusion Effects

� RECD

� Sound Mapping

� Probe Tube Calibration








� Insertion Gain




� RECD

� Sound Mapping


� Overview

� Guidelines

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Unaided measurement / response (Open ear gain, OEG) :

Measured with the probe tube placed in the open ear canal (i.e. no earmold or hearing instrument inserted)

The Unaided Response

� reflects the natural amplification of the signal by the outer ear, particularly within the frequency range for speech discrimination

� is required to calculate the Insertion Gain during Insertion Response measurements

� is required for transferring AC, MCL or UCL values from dB HL to dB SPL (SPLogram view: Particularly for comparing Aided Responses)

� can be used for calculating the Real Ear to Coupler Difference





Unaided measurement (Open ear gain, OEG)

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� Insertion Gain




� RECD

� Sound Mapping


� Overview

� Guidelines





Occluded measurement (Occluded response):

Measured with the probe tube placed in the ear canal and a mold or hearing instrument inserted, but with the hearing instrument turned off .

The Occluded measurement� shows the damping effect of the inserted earmold and can be used to

determine an appropriate vent size� shows the influence of occlusion on the natural amplification of the test

signal� indicates the principle of insertion gain measurements:

A hearing instrument (HI) must first provide a sufficient gain to overcome the loss of natural amplification before it can start accounting for the actual hearing loss

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Occluded response








� Insertion Gain




� RECD

� Sound Mapping


� Overview

� Guidelines

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Aided Measurement:

(Aided response, InSitu and/or coupler)

Measured with the probe tube placed in the open ear canal, together with a earmold or hearing instrument inserted in the ear canal and with the hearing instrument turned on.

The Aided Measurement

� reflects the sound pressure level measured at the ear drum of the client (if the input is a broadband signal, the RMS Value of the signal is also display)

� can be used to transfer AC, MCL or UCL values from dB HL to dB SPL (for SPLogram view) to compare different AR results




Aided Coupler Measurement

Stimulus:Depending on the fitting formula and the hearing instrument.


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Aided Coupler Measurement

(according to DSL v5)

with ILTASS@6565 / 8080 dB






Aided In-Situ Measurement

Stimulus:Depending on the fitting formula and the hearing instrument.

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� Insertion Gain




� RECD

� Sound Mapping


� Overview

� Guidelines





Insertion Gain (IG):

If an audiogram is available for one patient, the Target Gain will be shown in the Insertion Gain display (only “Gain” view available)

The Insertion Gain measurement:

� Is conducted with the probe tube placed in the ear canal, together with an earmold or hearing instrument inserted, and with the hearing instrument turned on

� Is calculated during measurements in Unity (REIG = REAR – REUR )� measured Unaided Response is subtracted from the measured

output at the ear drum of the client = Aided Response� Reflects the insertion gain for each presented frequency (if the input is

a broadband signal, the RMS value of the signal is also displayed)

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Insertion Gain (IG): Real Ear Insertion Gain (REIG)

Open measurement dialog:

� The measurement can be opened from the toolbar:

Prerequisite:

� Measured OEG

� The REIG will automatically be calculated of the REAG and the OEG:

REIG = REAG – REUG (OEG) (= REAR – REUR)

Stimulus type and level are always depending on the fitting formula and the hearing instrument.





Insertion Gain (IG): Real Ear Insertion Gain (REIG)

REIG measurements should be performed as follows:

1. Turn the hearing instrument OFF

2. Play back the calibration noise (use the “start” for this step)

3. Turn the hearing instrument ON

4. The measurement shall should run until the result is stable

5. Record the measurement by using the „Record“ button

Probe Microphone Measurements in Unity: Real-Ear Measurements

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� Insertion Gain




� RECD

� Sound Mapping


� Overview

� Guidelines





Input / Output Diagram

Can be performed as In-Situ (Real-ear) or coupler measurement.

The LI / LO measurement:

� addresses the output sound pressure level at the ear drum as a function of the input level for a certain frequency

� is mostly used to determine the compression properties of the hearing instrument

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Input / Output (LI/LO)








� Insertion Gain




� RECD

� Sound Mapping


� Overview

� Guidelines

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Open Ear Spectrum

The Open Ear Spectrum of the client is measured with the probe tube placed in the open ear canal, that is, when no earmold or hearing instrument is inserted. The main difference to OEG measurements is that the test signal is produced by the client (long vowels like “A” or “E”are recommended; a volume meter is displayed and the client should be instructed to keep the sound level inside the green area. Unity automatically accepts and records the curve during a measurement as soon as a valid measurement result is available.

The Open Ear Spectrum� cannot be measured in a 2 cc coupler� is required as basis for Occlusion Effect measurements, comparing the

resonance of internally generated sounds such as speech or chewing in an open and an occluded ear canal. An increase of resonances usually occurs in low frequencies.





Open Ear Spectrum

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� Insertion Gain




� RECD

� Sound Mapping


� Overview

� Guidelines




Occlusion EffectsOcclusion effects are the second part of Open Ear Response/Occlusion Effects � conducted with the probe tube placed in the ear canal and sealed with an earmold or hearing instrument. The client again is asked to produce e.g. “A” and “E” at the same level as during the OEG measurement; the volume meter supports adjusting the sound level

The Occlusion Effects measurement� Cannot be conducted in an 2 cc coupler � Shows the occurrence of resonances of internally generated sounds

(speech, chewing) in the occluded ear canal, mainly in low frequencies� Is calculated by subtracting the Open Ear Spectrum from the gain of

the output signal at the ear drum of the client� Reflects the occlusion effect for each presented Frequency when the

RMS value of the signal is accepted by Unity


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Occlusion Effects








� Insertion Gain




� RECD

� Sound Mapping


� Overview

� Guidelines

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RECD

(Real-Ear-to-Coupler Difference / Moodie, Seewald et. al. 1994)

RECD describes the difference of an acoustic response, measured in a 2cc-coupler and in an individual’s ear canal, using the same sound source, as a function of frequency in dB SPL

� The individual residual ear canal volume can be taken into account without the need of a complete In-Situ measurement for each fitting

� Calculated parameters can be stored

� Least possible strain for the patient

� RECD Measurement Procedure





RECD

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1. Insertion of Probe Tube not deep enough

2. Acoustical Leak / Venting

3. Grommet or Perforation

4. Eardrum Problems and / orOtitis Media with Effusion


RECD:

Possible sources of error /insecure measurement results

1. Capping at 2 - 3 kHz

2. Negative values at lower frequencies (-1 to -9 dB)

3. Negative values at lower frequencies (-10 to -15 dB)

4. Positive values at lower and mid frequencies








� Insertion Gain




� RECD

� Sound Mapping


� Overview

� Guidelines

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Sound Mapping

SPLogram view for verification:

� Optimum fit to residual dynamic range (using REAG / REAR)

� Behavior of HI for different input levels (LTASS = long term average speech spectrum)

� Compression characteristics of HI

� Complex hearing aid systems can be adjusted more accurately

� Reduced danger of over- and under-amplification

� Counseling of patients / relatives




Probe Microphone Measurements in Unity: Types of Real-Ear Measurements / Sound Mapping

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Sound Mapping

� Targets: Target gain curve display for the selected fitting formula

� Pictograms: (Optional) Demonstrate common noise sources and their relationship to the hearing loss

� Hearing Threshold: Patient’s hearing threshold converted to dB SPL

� Speech Field: Displaying the dynamic range of unamplified speech

� VU Meter: Current signal level [dB SPL] at the reference microphone

� Normal Threshold: A normal hearing threshold of 0 dB HL can be displayed in a SPL view as a reference





Sound Mapping

� Speech Field:

The Speech Field for unamplified speech with an average level of 60 dB SPL can be displayed as a reference; the spectrum corresponds to the long-term average of speech (LTASS) and is extended 12 dB above the average and 18 dB below the average for the dynamic range of speech.

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The Percentile Analysis can be used to display the dynamic range of the aided input signal using short-term, third-octave levels.

After 60s, the measurement result is displayed using percentiles, according to the probability of occurrence for loud = 99%, soft =30% and average = LTASS levels

Saturation Level (OSPL90):

Should be measured separately (using PT Sweep to make sure that narrow-band AGC-O is activated)

Percentile Analysis in Sound Mapping




Fitting recommendation for percentile analysis

How to use compression parameters (gain, CK, CR, AGC-o, time constants) appropriately?

First Fit

1. Fitting to medium Target (65dB) : LTASS for 65 dB ISTS� adjust via master gain

2. Fitting to highest Target (80dB) : LTASS for 80 dB ISTS� adjust via gain for loud input levels and compression ration

LTASS = long term average speech spectrum


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Fitting recommendation for percentile analysis

How to use compression parameters (gain, CK, CR, AGC-o, time constants) appropriately?

Fine Tuning

1. UCL: 99% - percentile for 80 dB ISTS / Output Level� adjust via MPO� little residual dynamic range: syllabic compression

2. Optimize Audibility (esp. 1-3 kHz, considering hearing threshold):30% - percentile for 65 dB ISTS / Output Level

� adjust via gain for soft input levels


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Beside the existing percentile analysis, the new SW version provides a graphic equalizer display in Sound Mapping to support counseling of patients.

It displays the live spectra of the incoming signal, picked up by the probe microphone. Maximum levels and average level (LTASS) are displayed and can be stored.

Graphic Equalizer in Sound Mapping


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Probe Microphone Measurements in Unity: Verification of Simulated HI Gain / Output

Connexx simulation Unity measurement





Patient Voice / External Signals

In Sound Mapping , any External Signal can be used for Real-ear measurements.

With the help of Patient Voice , the effect of live speech amplified by the HI can be demonstrated (required for measuring the Open Ear Spectrum and Occlusion Effects).

For better orientation, THR, MCL, UCL and targets can be displayed.

VU monitoring of external signals

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� Insertion Gain




� RECD

� Sound Mapping


� Overview

� Guidelines




A calibration of the probe tube

must be carried out prior to a

real-ear measurement.

It should be repeated every time

the probe tube is replaced.

Probe Microphone Measurements in Unity: Calibration of the probe tube

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Probe Microphone Measurements in Unity:

Presets and Diagram settings

� Overview

� Guidelines




Probe Microphone Measurements in Unity: Presets and Diagram settings

General Settings for Devices and Measurement Defaults can be selected and changed in the “Settings” menu

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Presets for audiometry data General settingsand reference curves

The current status of the diagram is displayed in the status bar:

Probe Microphone Measurements in Unity: Presets and Diagram settings





User Interface Display

Fitting Rationales

Signal Types

Measurement Procedures

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Fitting Rationales

Signal Types

Measurement Procedures� back




Probe Microphone Measurements in Unity: Start Screen (Unaided Measurement, OEG)

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Probe Microphone Measurements in Unity: User Interface Display





Control Tabs for selecting the measurement type

Broadband Measurements

Narrow-band Measurements

(if available)

Single Tone Measurements

(if available)

Results List

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Sample Audiogram:� AC: 40 dB HL � BC: 35 dB HL� MCL: 75 dB HL� UCL: 100 dB HL

SPLogram: calculation of equivalent SPL values at the eardrum

LdB(SPL) = LdB(HL) + MAP*

For coupler measurements, individual or statistical RECD values are subtracted

* MAP: Minimum Audible Pressure


Configuration of SPLogram Display

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Fitting Rationales

Signal Types


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Probe Microphone Measurements in Unity:Fitting rationales and prescriptive formulas

� Unity offers several linear fitting rationales (NAL-RP, POGO II, etc.) and non-linear formulas such as DSL[i/o], DSL v5 and NAL-NL1

� Especially for fitting hearing instruments in patients with a sensori-neural hearing loss, non-linear target prescriptions are required

� Target gain is calculated and displayed automatically based on entered tone audiogram values

� Target gain is calculated and can be measured for real ear Probemeasurements as well as for 2 cc Coupler

� In Unity, the desired target prescription can be selected from the following list:




Linear fitting formulas, e.g. Half-gain rule (HV ½):

Appropriate for

� Conductive hearing loss� Profound hearing loss

Non-linear prescription rules (DSL [i/o], DSL v5, NAL-NL1):

Appropriate for

� Sensorineural hearing loss, especially with recruitment

Probe Microphone Measurements in Unity:Fitting rationales and prescriptive formulas

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Fitting Rationales

Signal Types





Pure tone (PT): Sinusoidal pure tone

Warble (WT): Pure tone, modulated by a second tone (triangular signal), bandwidth spread over 1/3 octave

Narrow-band Noise (NN): Random noise, filtered to 1/3 octave

Pink noise (PN): Broad-band signal, pink weighted pseudo-random noise

Speech noise (SN): Broad-band signal, pseudo-random noise, shaped as the average of human speech

White random noise (WN): Broad-band signal, random noise

Probe Microphone Measurements in Unity: Signal Types

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ICRA: International Collegium of Rehabilitative Audiology by HACTES work group (Hearing Aid Clinical Test Environment Standardization)

ICRA signals contain individual level information to reflect the loudness of the signal. Level information is retained during signal presentation (e.g. 70 dB signal level with URGN-M-L results in 82.1 dB)

Resulting level = signal level selected + relative level of the track

Together with ICRA signals, signal levels at 50, 65 and 80 dB are recommended to collect information about the dynamic range of the hearing instrument. The selection of an ICRA signal will give the remaining level information.

Probe Microphone Measurements in Unity: Signal Types




ICRA signals are best used for verification of HI with noise suppression

Client interview about listening environments to select ICRA type accordingly � hearing instruments can adapt to a realistic signal

URGN-M-N: Un-modulated speech-weighted noise, Male, Normal effort, Level: Lref

URGN-M-R: Un-modulated speech-weighted noise, Male, Raised effort, Level: Lref + 5.7 dB

URGN-M-L: Un-modulated speech-weighted noise, Male, Loud effort, Level: Lref + 12.1 dB

Probe Microphone Measurements in Unity: Signal Types (ICRA)

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Probe Microphone Measurements in Unity: Signal Types (ICRA)

3BSMN-F-N: 3 -band Speech-weighted Modulated Noise (3bSMN), Female, Normal effort, Level: Lref

2PB-1F1M-N: 2 Persons Babble, 1 Female 3bSMN + 1 Male 3bSMN Idealized speech spectrum. Normal effort, Level: Lref

6PB-N: 6 persons babble, 1f + 1m + 2f-6dB + 2m-6dB, all 3bSMN Idealized speech spectrum. Normal effort, Level: Lref+4.7 dB

6PB-R: 6 persons babble, 1f + 1m + 2f-6dB + 2m-6dB, all 3bSMNIdealized speech spectrum. Raised effort, Level: Lref+10.7 dB

6PB-L: 6 persons babble, 1f + 1m + 2f-6dB + 2m-6dB, all 3bSMNIdealized speech spectrum. Loud effort, Level: Lref+17.2 dB






Fitting Rationales

Signal Types


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Probe Microphone Measurements in Unity: Preparation / setup of real-ear measurements

� Calibration of the probe tube

� Adjustment / check of hearing instrument settings(program appropriate test settings)

� Adjustment / check of diagram settings

� Selection of fitting rationale and / or adjustment of configurations

� Selection of appropriate test signal type and input level

� Adjustment of the maximum output level (account for individual UCL)

� Determination of appropriate tube length and insertion of probe tube into the ear canal




Determination of appropriate tube length:

For reliable high-frequency sound during a measurement (e.g. aided response), the probe tube should exceed the earmold by at least 5 mm ( � decrease the influence of standing waves in the ear canal), but not touch the eardrum.

A correct placement of the probe tip in the ear can al relative to the ear drum is crucial for correct real ear measuremen ts.

Probe Microphone Measurements in Unity: Real-ear Measurements

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Insert Probe Tube into ear canal

� measure sound pressure output of HI directly at the eardrum





Insert Earmold

and attach hearing instrument

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RECD Measurements in Unity

� back

� Overview





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Unity 2 supports two different methods for obtainin g RECD:

� With hearing instruments in free sound field (the reference signal is applied via loudspeaker and amplified by HI � Real-ear and Coupler measurement are compared)

� With insert phones (e.g. with Eartones 3A/5A or In-Situ Headset) � recommended option

The probe tube of the In-Situ Headset must be calibrated prior to the measurement.




Presets for RECD measurements in Unity


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Option 1:

RECD measurement using Insert Earphones

(recommended)






RECD measurementusing Insert Earphones

(Select under Measurement Defaults for RECD type /transducer in Unity )

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1A) Application of sound signal to 2cc BTE coupler (HA2)using insert earphones





1B) Application of sound signal to 2cc BTE coupler (HA2)using insert earphonesadapter of In-Situ headset


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2) Stage 1:

Record the coupler portion of RECD





2) Stage 1:

Coupler portion of RECD


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3a) Determine the appropriate tube length for the probemicrophone





3b) Attach an ear tip to the end of the handle

The handle contains both, the receiver tube and the probe tube.

The probe outlet of the handle tube should always be elongated with the short, 5mm tube to get the opening closer to the eardrum.


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4a) Insert the probe tube

�� measure sound pressure output of HI directly at the eardrum





5a) Carefully insert earmoldand attach inserts


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5b) Carefully insert ear tip





7) Stage 2: Real EarMeasurement

Apply reference signal and measure the individual RECD for each ear (Real-ear portion)

Stimulus: For the test signal, it is recommend to use white noise at a level of 70 dB


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Coupler response (usually blinded)

Real-ear-to-Coupler Difference (RECD)

7) Stage 2: Real-EarMeasurement

Measure the individual RECD for each ear (Real-ear portion)





Resulting Real-ear-to-Coupler Difference (RECD)


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RECD in Unity:

Configurations for DSL v5 and NAL-NL1

� back

� Overview




RECD in Unity:Configuration of RECD dialog

Insert measured RECD in Unity

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DSL v5 Configuration:

Insert

� (developmental) age� Transducer used for assessment� RECD type� number of HI channels





DSL v5 Configuration:

Manually insert measured RECD

�� Advanced Settings


53




Manual insertion of measured RECD in Unity (DSL v5 dialog)

�� RECD Left / Right





Configuration dialog for NAL - NL1


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Verification in Connexx

� back




Verification in Connexx

Programming of test settings: FOG, omnidirectional/directional for coupler and In-Situ measurements

55




Verification in Connexx: Direct measurement using Unity

Direct measurements: Measuring Box (coupler measurement)




Verification in Connexx: Direct measurement using Unity

Direct measurements: In-Situ (Real-ear measurement)

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Hearing InstrumentAnalyzer

Unity 2:




Unity 2 Hearing Instrument Analyzer

Two test procedures are possible:

1. Auto Test

All measurements in one complete test sequence according to a particular standard :

� ANSI S3.22-1987� ANSI S3.22-1996� IEC 118-7/A1

2. Stand-alone measurements

All measurements are carried out separately. The single measurements do not need to conform with standards. Other signal types, signal levels, etc. can be used. It is possible to choose default settings according to the standards.

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Start fromUnity

environment

Start fromNOAH module

Unity 2 Hearing Instrument Analyzer:Starting / Accessing the Module




Unity 2 Hearing Instrument Analyzer:User Interface

OSPL90Reference Test Gain

Full On Gain

Frequency Response

Curve

Equivalent Input Noise

Harmonic Distortion

Level Input / Level Output

Attack and

Release Time

Induction Coil

Auto-test Dialog

Battery Current

Single Test Toolbar

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Control PanelControl Panel

Measurement View

Toolbar

Status Bar





Results Window

Open the result window via the right tab in the control panel

Selection of a context menu: Click on right mouse button

Delete Curve:

Deletes the selected measurement

Delete All Curves:Deletes all shown measurements

Freeze Curve: Deletion of measurement not possible

Unfreeze Curve:Deletion possible again

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Unity 2 Hearing Instrument Analyzer:Auto Test

Starting Auto Test

Via Menu:

Measurements � Auto Test

Or via in Toolbar Button:

Configure Test Parameters

To change HI parameters during Auto Test, select Start Connexx Mini

Start Auto Test with Start button




Unity 2 Hearing Instrument Analyzer:Connexx Mini

Start CXX Mini to adjust Settings in Siemens Hearing Instruments:

Settings � Adjust Hearing Instrument

or

Open with Symbol in Toolbar

or

Start automatically with Auto Test

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Unity 2 Hearing Instrument Analyzer:Auto-Test Sequence




Unity 2 Hearing Instrument Analyzer:Presets (Single Test Settings)

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Thanks for your attention!

unity 2 / v4.7.1 probe mic. (real-ear, coupler and … · end program session list connexx module...

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