Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Gain01:15

Gain

339
Gain and phase shift are properties of linear circuits that describe the effect a circuit has on a sinusoidal input voltage or current. The circuit's behavior that contains reactive elements will depend on the frequency of the input sinusoid. As a result, it is observed that the gain and phase shift will all be frequency functions.
Gain:
Suppose Vin is the input and Vout is the output signal to a circuit.
339
Characteristics of Practical Op Amps01:16

Characteristics of Practical Op Amps

793
A difference amplifier, a crucial component in numerous electronic devices, ideally amplifies only the difference-mode signal, which is the difference between two input signals. However, in practical circuits, the output voltage depends on both the differential gain and the common-mode gain.
The ratio of differential gain to the common-mode gain is defined as the common-mode rejection ratio (CMRR). This ratio quantifies the ability of operational amplifiers (op-amps) to reject common-mode...
793
Small-Signal Analysis of MOSFET Amplifiers01:23

Small-Signal Analysis of MOSFET Amplifiers

1.0K
In small-signal analysis, a MOSFET transistor amplifier acts as a linear amplifier when operating in its saturation region. The gate-to-source voltage (VGS) of the MOSFET is the sum of the DC biasing voltage and the small time-varying input signal. This combination sets up the operating point and modulates the drain current (ID) that flows from the drain to the source. When a small AC signal is superimposed on the DC bias voltage at the gate, the instantaneous drain current comprises three...
1.0K
Sum and Difference OpAmps01:22

Sum and Difference OpAmps

1.3K
Operational amplifiers (op-amps) are versatile devices that extend beyond amplification. In this context, two specific op-amp configurations are explored: the summing and difference amplifiers.
A summing amplifier, or an adder, utilizes an op-amp to merge multiple input signals into a single output signal. When audio signals are introduced into its input channels, the input resistors initiate currents that traverse feedback resistors, resulting in an output voltage. Applying Kirchhoff's current...
1.3K
Effects of feedback01:24

Effects of feedback

922
Feedback in control systems plays a critical role in shaping various operational parameters, extending beyond simple error reduction to influence stability, bandwidth, gain, impedance, and sensitivity. Understanding these effects requires examining a basic feedback system characterized by defined input, output, error, and feedback signals.
Feedback significantly modifies the gain of a control system. The gain of a system without feedback is altered by a factor of one plus GH, where G represents...
922
Interference: Path Lengths01:10

Interference: Path Lengths

1.8K
Consider two sources of sound, that may or may not be in phase, emitting waves at a single frequency, and consider the frequencies to be the same.
Two special sources may be considered when they are in phase. This can be easily achieved by feeding the two sources from the same source. An example would be synchronizing the two speakers by feeding them with the same source, such as the sound waves produced by a tuning fork. This setup ensures that the two sources have the same frequency and are...
1.8K

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Comparison of In-Situ and Retrospective Self-Reports on Assessing Hearing Aid Outcomes.

Journal of the American Academy of Audiology·2020
Same author

Is the Device-Oriented Subjective Outcome (DOSO) Independent of Personality?

Journal of the American Academy of Audiology·2017
Same author

Longitudinal Predictors of Aided Speech Audibility in Infants and Children.

Ear and hearing·2016
Same author

Trends and Predictors of Longitudinal Hearing Aid Use for Children Who Are Hard of Hearing.

Ear and hearing·2016
Same author

Speech Recognition and Parent Ratings From Auditory Development Questionnaires in Children Who Are Hard of Hearing.

Ear and hearing·2016
Same author

The importance of high-frequency audibility with and without visual cues on speech recognition for listeners with normal hearing.

International journal of audiology·2015

Related Experiment Video

Updated: Jan 2, 2026

Sound Source Localization Testing in Single-sided Deafness Following Bone Conduction Intervention
04:32

Sound Source Localization Testing in Single-sided Deafness Following Bone Conduction Intervention

Published on: December 20, 2024

766

Compression-dependent differences in hearing aid gain between speech and nonspeech input signals.

Rebecca Warner Henning1, Ruth Bentler

  • 1University of Iowa, Iowa City, IA, USA.

Ear and Hearing
|August 5, 2005
PubMed
Summary

Hearing aid gain measured with non-speech signals differs from speech, especially with increased compression settings. For accurate hearing aid fitting, use real speech signals or non-speech signals with similar properties.

More Related Videos

Electrically Evoked Stapedius Reflex Measurements in Cochlear Implantation and Its Application in the Postoperative Fitting Process
07:00

Electrically Evoked Stapedius Reflex Measurements in Cochlear Implantation and Its Application in the Postoperative Fitting Process

Published on: June 21, 2024

1.4K
Systematic Hearing Performance Evaluation Process for Adolescents with Cochlear Implantation at Early Ages
06:04

Systematic Hearing Performance Evaluation Process for Adolescents with Cochlear Implantation at Early Ages

Published on: March 24, 2023

716

Related Experiment Videos

Last Updated: Jan 2, 2026

Sound Source Localization Testing in Single-sided Deafness Following Bone Conduction Intervention
04:32

Sound Source Localization Testing in Single-sided Deafness Following Bone Conduction Intervention

Published on: December 20, 2024

766
Electrically Evoked Stapedius Reflex Measurements in Cochlear Implantation and Its Application in the Postoperative Fitting Process
07:00

Electrically Evoked Stapedius Reflex Measurements in Cochlear Implantation and Its Application in the Postoperative Fitting Process

Published on: June 21, 2024

1.4K
Systematic Hearing Performance Evaluation Process for Adolescents with Cochlear Implantation at Early Ages
06:04

Systematic Hearing Performance Evaluation Process for Adolescents with Cochlear Implantation at Early Ages

Published on: March 24, 2023

716

Area of Science:

  • Audiology
  • Acoustics
  • Signal Processing

Background:

  • Hearing aid gain is crucial for speech audibility but often measured using non-speech signals.
  • Compression hearing aids can exhibit different gain with non-speech versus speech inputs.
  • Understanding these differences is key for accurate hearing aid fitting.

Purpose of the Study:

  • To systematically evaluate how hearing aid compression parameters affect gain differences between non-speech and speech signals.
  • To investigate the influence of release time, compression ratio, and number of channels on gain discrepancies.
  • To determine the interactions between these parameters and their impact on measured gain.

Main Methods:

  • Speech and non-speech signals were presented to a master hearing aid circuit at average (65 dB SPL) and loud (80 dB SPL) levels.
  • Hearing aid gain was measured in one-third octave bands across various combinations of release time, compression ratio, and channel count.
  • Multiple regression analysis quantified the effects of compression parameters on gain differences.

Main Results:

  • Gain differences varied significantly (-3.1 to 10.4 dB) based on frequency, signal type, and input level.
  • Compression parameters explained over 70% of the variance in gain differences.
  • At 65 dB SPL, increased release time and compression ratio generally increased gain differences; more channels amplified this effect when spectra differed.
  • At 80 dB SPL, increasing compression ratio decreased gain differences, with release time and channels having minimal impact.

Conclusions:

  • Hearing aid compression parameters (release time, ratio, channels) significantly influence gain differences between non-speech and speech signals.
  • Accurate hearing aid gain measurement ideally requires using real speech signals.
  • If non-speech signals are used, they should possess spectral and temporal characteristics similar to speech.