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Related Experiment Videos

Converting insertion gain to and from headphone coupler responses

H Dillon1

  • 1National Acoustic Laboratories, Australia.

Ear and Hearing
|August 1, 1997
PubMed
Summary

This study demonstrates how to convert insertion gain responses to headphone responses and vice versa. The findings enable accurate acoustic measurements for various listening devices, improving audio device evaluations.

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Area of Science:

  • Acoustics
  • Audiology
  • Signal Processing

Background:

  • Insertion gain measurements are crucial for hearing aid fitting.
  • Headphone responses are essential for evaluating audio devices.
  • Standardizing these measurements is challenging due to differing methodologies.

Purpose of the Study:

  • To establish a theoretical framework for translating insertion gain responses to headphone responses.
  • To provide a method for converting headphone responses to insertion gain responses.
  • To facilitate accurate acoustic analysis across different audio measurement scenarios.

Main Methods:

  • Theoretically derived the relationship between insertion gain and headphone responses.
  • Incorporated real-ear to coupler differences (RECD) and real-ear unaided responses (REUR).

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  • Utilized published data to derive and validate correction factors.

    • Main Results:

    • Developed equations to convert between insertion gain and headphone response types.
    • Correction factors were derived from existing literature.
    • Validated combined correction factors against independent published data.

    Conclusions:

    • The presented equations and data allow for the conversion of insertion gain responses to headphone-compatible responses.
    • This methodology is applicable to insert phones as well.
    • Facilitates consistent acoustic evaluations for hearing aids and headphones.