Modified Speech-in-Noise Test Battery for Complex Listening Environments
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Solution Overview
Problem
Current clinical speech-in-noise tests fail to accurately assess speech perception in complex listening environments, as they do not adequately simulate real-world conditions, leading to discrepancies between clinical assessments and everyday communication difficulties experienced by individuals with hearing loss.
Innovation Solution
Development of an expanded speech-in-noise test battery that mimics various complex listening environments by modifying the QuickSIN test to include conditions with binaural cues, visual speech cues, and simulated reverberation, allowing for a more comprehensive evaluation of speech perception in noisy and reverberant settings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If clinical speech-in-noise tests use simple listening situations with stable and predictable noise backgrounds, then testing procedures are easy to administer and interpret, but they fail to reflect the complex listening environments that hearing impaired listeners experience in the real world
Solution Approach 1:
The patent applies parameter changes by systematically varying multiple stimulus parameters simultaneously: adding spatial separation between target and noise sources, introducing room reverberation, using dynamic noise backgrounds instead of stable ones, and incorporating visual speech cues. These parameter changes transform the simple clinical test into a complex simulation of real-world listening environments while maintaining standardized administration procedures.
Solution Approach 2:
The patent creates simplified copies of complex real-world listening environments by synthesizing auditory stimuli that replicate key characteristics of natural scenes: spatially separated talkers, reverberant rooms, and dynamic noise patterns. These copied environments are presented in a controlled clinical setting, allowing patients to experience realistic listening challenges without requiring actual field testing.
2Device complexity
If clinical speech-in-noise tests are presented diotically without binaural cues, then test administration is simplified, but they cannot capture the spatial release from masking that occurs in real world auditory stimuli
Solution Approach 1:
The patent transitions from monaural/diotic presentation to binaural/spatial presentation by adding the spatial dimension to test delivery. Target speech and noise are presented from different spatial locations using binaural rendering techniques, creating interaural time and level differences that provide spatial release from masking. This dimensional expansion allows the test to assess spatial hearing abilities while maintaining controlled clinical administration.
3Manufacturing precision
If clinical speech-in-noise tests are presented anechoically without room reverberation, then signal quality is clear and uncontaminated, but they lack the signal distortions that occur in the kinds of indoor listening environments where most voice communication occurs
Solution Approach 1:
The patent applies preliminary action by pre-processing the audio signals with room impulse responses that simulate reverberant environments before presentation. The speech and noise signals are convolved with impulse responses representing typical indoor spaces (offices, classrooms, restaurants), thereby pre-installing the characteristic distortions and temporal smearing of reverberant sound fields. This allows the test to assess performance in realistic acoustic conditions while maintaining precise control over the reverberation parameters.
4Measurement precision
If clinical speech-in-noise stimuli are presented without visual speech cues, then auditory processing is isolated and measured, but they are unavailable to most hearing impaired listeners when they attempt to communicate in high-noise environments
Solution Approach 1:
The patent applies dynamics by making the test configuration adaptable and changeable. The system can dynamically switch between audio-only and audiovisual conditions, allowing the same test battery to serve multiple purposes: isolating auditory processing when needed and assessing comprehensive communication ability when visual cues are incorporated. This dynamic flexibility enables the test to adapt to different clinical questions and patient needs.
Data Source
AI summary
The present application describes a plurality of test simulation environment mimic complex listening environment of everyday life, comprising a speech component, and a noise component. The application also describes an auditory testing system and method for evaluating a listener's speech perception and method to test hearing prosthesis or hearing protection device's effect on a person's speech perception in a complex listening environment.