Hearing Study: Sensitivity to Features of Speech Sounds

Study Results

Results available

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Basic Information

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Recruitment Status

COMPLETED

Clinical Phase

NA

Total Enrollment

67 participants

Study Classification

INTERVENTIONAL

Study Start Date

2020-06-09

Study Completion Date

2024-08-01

Brief Summary

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The purpose of this study is to better understand the sensitivity of listeners to the fast changes in frequency or amplitude of sounds that occur in speech. The investigators are studying ways to manipulate these aspects of sounds in an effort to make speech sounds more clear.

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Detailed Description

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The investigators will test listeners with normal hearing or with mild or moderate hearing loss. Tests will first focus on sensitivity to changes in fast changes in amplitude (loudness) or frequency (pitch) in sounds. Then the investigators will test the intelligibility of synthetic vowels and syllables in which these "chirps" are manipulated. Finally, the investigators will test intelligibility of words in noise while manipulating sounds in an effort to improve clarity.

Conditions

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Hearing Loss, Sensorineural

Study Design

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Allocation Method

NON_RANDOMIZED

Intervention Model

PARALLEL

Primary Study Purpose

BASIC_SCIENCE

Blinding Strategy

NONE

Study Groups

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Normal Hearing

Signal processing to improve intelligibility

Group Type ACTIVE_COMPARATOR

Signal processing to improve intelligibility

Intervention Type OTHER

Signal processing will be used to manipulate frequency and amplitude fluctuations in complex sounds.

Mild hearing loss

Signal processing to improve intelligibility

Group Type ACTIVE_COMPARATOR

Signal processing to improve intelligibility

Intervention Type OTHER

Signal processing will be used to manipulate frequency and amplitude fluctuations in complex sounds.

Moderate hearing loss

Signal processing to improve intelligibility

Group Type ACTIVE_COMPARATOR

Signal processing to improve intelligibility

Intervention Type OTHER

Signal processing will be used to manipulate frequency and amplitude fluctuations in complex sounds.

Interventions

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Signal processing to improve intelligibility

Signal processing will be used to manipulate frequency and amplitude fluctuations in complex sounds.

Intervention Type OTHER

Eligibility Criteria

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Inclusion Criteria

* Normal hearing, mild or moderate symmetric sensorineural hearing loss.

Exclusion Criteria

* Asymmetric hearing thresholds (more than 15 decibels (dB) threshold difference between the two ears at any frequency up to 4 kHz).
* Severe hearing loss (greater than 60 dB hearing thresholds at any frequency up to 4 kHz).

Minimum Eligible Age

18 Years

Maximum Eligible Age

80 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

Yes