Ignite Creation Date:
2025-12-25 @ 4:12 AM
Ignite Modification Date:
2025-12-26 @ 3:10 AM
Study NCT ID:
NCT05954520
Status:
WITHDRAWN
Last Update Posted:
2025-06-12
First Post:
2023-07-13
Is NOT Gene Therapy:
False
Has Adverse Events:
False
Brief Title:
Effects of Nonlinear Signal Processing Algorithms on Speech Perception
Sponsor:
Indiana University
Organization:
Study Overview
Official Title:
Effects of Nonlinear Signal Processing Algorithms on Speech Perception
Status:
WITHDRAWN
Status Verified Date:
2025-06
Last Known Status:
None
Delayed Posting:
No
If Stopped, Why?:
The student conducting this work took a job at another institution and is no longer continuing this study.
Has Expanded Access:
False
If Expanded Access, NCT#:
N/A
Has Expanded Access, NCT# Status:
N/A
Acronym:
None
Brief Summary:
The purpose of this study is to investigate the effect of nonlinear signal processing algorithms on speech perception.
Detailed Description:
In this study, we are interested in how nonlinear algorithms influence speech perception.
Nonlinear algorithms are used within hearing aids and personal sound amplifiers to provide comfort to the listener. One of these algorithms provides amplification (gain) in a manner that depends on the level of the input sound.: Low-level sounds are amplified much more than high-level sounds. This type of amplification makes sounds more comfortable for listeners, but also distorts incoming sounds. To determine the effect of these algorithms on speech understanding, we will evaluate the following factors on speech perception, within the context of these algorithms:
* The input Signal-to-Noise ratio (SNR) to the algorithm (3 different SNRs)
* The type of background noise (20 people talking or 2 people talking)
* Algorithm settings (slow and fast - whether changes to gain applied to fluctuating input sounds occurs quickly or slowly)
To address our questions, we are using a wearable processor (Tympan) that allows for real-time processing of audio signals. The Tympan itself contains microphones, a processor, and small earpieces that include speakers. A listener can wear the earpieces, like headphones, and listen to sounds processed by the Tympan in real time. The Tympan allows us access to the algorithms and to the sounds processed by the algorithms so that we cannot algorithm behavior to speech perception.
Our study will complement existing work on speech perception and nonlinear algorithms, but our study will be the first to use a wearable processor in which the specific algorithm is known, tailored to an individual's hearing levels, and which allows for direct calculation of the output SNR. Most studies also have not measured speech perception, and this will be one of only a handful of studies with that objective.
Nonlinear algorithms are used within hearing aids and personal sound amplifiers to provide comfort to the listener. One of these algorithms provides amplification (gain) in a manner that depends on the level of the input sound.: Low-level sounds are amplified much more than high-level sounds. This type of amplification makes sounds more comfortable for listeners, but also distorts incoming sounds. To determine the effect of these algorithms on speech understanding, we will evaluate the following factors on speech perception, within the context of these algorithms:
* The input Signal-to-Noise ratio (SNR) to the algorithm (3 different SNRs)
* The type of background noise (20 people talking or 2 people talking)
* Algorithm settings (slow and fast - whether changes to gain applied to fluctuating input sounds occurs quickly or slowly)
To address our questions, we are using a wearable processor (Tympan) that allows for real-time processing of audio signals. The Tympan itself contains microphones, a processor, and small earpieces that include speakers. A listener can wear the earpieces, like headphones, and listen to sounds processed by the Tympan in real time. The Tympan allows us access to the algorithms and to the sounds processed by the algorithms so that we cannot algorithm behavior to speech perception.
Our study will complement existing work on speech perception and nonlinear algorithms, but our study will be the first to use a wearable processor in which the specific algorithm is known, tailored to an individual's hearing levels, and which allows for direct calculation of the output SNR. Most studies also have not measured speech perception, and this will be one of only a handful of studies with that objective.
Study Oversight
Has Oversight DMC:
False
Is a FDA Regulated Drug?:
False
Is a FDA Regulated Device?:
True
Is an Unapproved Device?:
None
Is a PPSD?:
None
Is a US Export?:
False
Is an FDA AA801 Violation?: