Skip to main page content
U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.

Https

The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

Access keys NCBI Homepage MyNCBI Homepage Main Content Main Navigation
. 1996 Sep;1(3):86-114.
doi: 10.1177/108471389600100302.

Microcomputer applications for hearing aid selection and fitting

R de Jonge  1
Affiliations

Microcomputer applications for hearing aid selection and fitting

R de Jonge. Trends Amplif. 1996 Sep.
No abstract available

PubMed Disclaimer

Figures

Figure 1.
Figure 1.
Subject data for an individual with moderate hearing loss given by the MSUv3.1 program.
Figure 2.
Figure 2.
Prescription for the hearing loss shown in Figure 1.
Figure 3.
Figure 3.
Thresholds, LDLs, REUR, and RECD values entered into the DSLv3.1 program.
Figure 4.
Figure 4.
Selection results calculated by DSLv3.1 for the patient in Figure 3.
Figure 5.
Figure 5.
Target 2-cc coupler gain and OSPL90 recommended by DSLv3.1 for the patient in Figure 3.
Figure 6.
Figure 6.
Measured versus target gain (REIG) and output (RESR) computed by DSLv3.1.
Figure 7.
Figure 7.
Unaided results for the subject data described in Figures 3 to 6.
Figure 8.
Figure 8.
Aided results for the subject data described in Figures 3 to 6.
Figure 9.
Figure 9.
Threshold and audiometer calibration information is entered for the IHAFF procedure.
Figure 10.
Figure 10.
Contour data entered for 500 and 3000 Hz for the left ear.
Figure 11.
Figure 11.
Threshold and equal loudness contours for the data shown in Figure 10.
Figure 12.
Figure 12.
VIOLA graph showing possible choices for compression parameters defining the input-output function needed to hit the targets based on the loudness judgment shown in Figures 10 and 11.
Figure 13.
Figure 13.
Screen showing first question of the APHAB when the client enters data.
Figure 14.
Figure 14.
Display showing unaided results of the APHAB.
Figure 15.
Figure 15.
Display show aided results of the APHAB.
Figure 16.
Figure 16.
Display comparing the unaided and unaided results (benefit) of the APHAB.
Figure 17.
Figure 17.
Data entry screen for the Fig6 program.
Figure 18.
Figure 18.
Target coupler gain for 40, 65, and 95 dB inputs calculated by Fig6.
Figure 19.
Figure 19.
Audiogram data entry card for the SII calculations.
Figure 20.
Figure 20.
An example of aided SII calculations.
Figure 21.
Figure 21.
A sample screen from the HAS 2.5 program illustrating audiogram thresholds (O), loudness discomfort levels (U), and the audibility of the speech spectrum.
Figure 22.
Figure 22.
The same audiogram in Figure 21 after the speech spectrum has been amplified by the REIR specified by the NAL-R procedure.
Figure 23.
Figure 23.
Target REIR needed to produce the amplified speech spectrum shown in Figure 22. Three additonal level-dependent targets are displayed. These target were created by the LDN procedure.
Figure 24.
Figure 24.
The relationship between articulation index values and speech intelligibility and critical differences.
Figure 25.
Figure 25.
The HA-1 2-cc full-on gain needed to give the REIR shown in Figure 23.
Figure 26.
Figure 26.
Target HA-1 2-cc SSPL90 corresponding to the LDLs shown in Figures 21 and 22.
Figure 27.
Figure 27.
Card where custom values for the RECD can be entered.
Figure 28.
Figure 28.
Dynamic range compression ratios needed to map the normal dynamic range into the dynamic range shown in Figures 21 and 22.
Figure 29.
Figure 29.
Tutorial information related to dynamic range compression.
Figure 30.
Figure 30.
Sample input-output functions for a set of compression parameters and the target needed to normalize loudness.
Figure 31.
Figure 31.
An example of calculations showing expected masking effect of noise.
Figure 32.
Figure 32.
Articulation index functions predicting the effect of noise upon speech intelligibility.
Figure 33.
Figure 33.
Options for parallel vents.
Figure 34.
Figure 34.
The “Specification” window from DSL 4.0 showing target OSPL90, gain, and compression ratios.
Figure 35.
Figure 35.
The “SPLogram - Verification” window. Target level-dependent frequency response curves are shown.
Figure 36.
Figure 36.
A sample DSL[i/o] input-output function along with the online help manual and tutorial.
Figure 37.
Figure 37.
A sample HASP screen showing the results of an automatic search for an ITE aid.
Figure 38.
Figure 38.
HASP display illustrating information available when used in the manual mode.
Figure 39.
Figure 39.
Coupler gain required to match the target REIR.
None
See this image and copyright information in PMC

Similar articles

See all similar articles

Cited by

References

    1. American National Standards Institute. (1969). American National Standard Methods for Calculation of the Articulation Index. (ANSI S3.5–1969). New York: ANSI
    1. American National Standards Institute. (Draft). American National Standard Methods for The Calculation of the Speech Intelligibility Index. (ANSI S3.79-Draft). New York: ANSI
    1. Bentler RA, Pavlovic CV. (1989). Transfer functions and correction factors used in hearing aid evaluation and research. Ear Hear 10: 58–63 - PubMed
    1. Bentler RA, Pavlovic CV. (1992). Addendum to “Transfer functions and correction factors used in hearing aid evaluation and research.” Ear Hear 13: 284–286 - PubMed
    1. Berger KW, Hagberg EN, Rane RL. (1979). Determining hearing aid gain. Hear Instr 30: 26–28,44.

LinkOut - more resources