Effects of Nonlinear Signal Processing Algorithms on Speech Perception

Status Recruiting

Clinical Trial Summary

The purpose of this study is to investigate the effect of nonlinear signal processing algorithms on speech perception.

Clinical Trial 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. ;

Study Design

Related Conditions & MeSH terms

Clinical Trial Details

NCT number	NCT05954520
Study type	Interventional
Source	Indiana University
Contact	Jennifer Lentz, PhD
Phone	18128558945
Email	jjlentz@iu.edu
Status	Recruiting
Phase	N/A
Start date	August 1, 2023
Completion date	May 30, 2025

View Details

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Clinical trials are conducted in a series of steps, called phases - each phase is designed to answer a separate research question.

Phase 1: Researchers test a new drug or treatment in a small group of people for the first time to evaluate its safety, determine a safe dosage range, and identify side effects.
Phase 2: The drug or treatment is given to a larger group of people to see if it is effective and to further evaluate its safety.
Phase 3: The drug or treatment is given to large groups of people to confirm its effectiveness, monitor side effects, compare it to commonly used treatments, and collect information that will allow the drug or treatment to be used safely.
Phase 4: Studies are done after the drug or treatment has been marketed to gather information on the drug's effect in various populations and any side effects associated with long-term use.