Detection mechanisms for processing delays in simulated vented hearing devices

Area of Science:

• Audiology
• Acoustics
• Psychoacoustics

Background:

• Processing delays in hearing devices, particularly with vented or open fits, are known disturbances.
• While the impact of delays is understood, perception thresholds and detection mechanisms remain unclear.

Purpose of the Study:

• To systematically assess delay detection thresholds in simulated linear vented hearing devices.
• To investigate the role of spectral effects in delay perception.
• To determine the psychometric function for delay detection and compare it with model predictions.

Main Methods:

• Experiments were conducted with normal-hearing listeners using simulated linear vented hearing devices.
• Spectral effects of delays were manipulated (compensated or not).
• Psychometric functions were determined for delay detection.

Main Results:

• Delay detection thresholds were systematically determined for the first time in this context.
• The study linked delay detection to spectral artifacts, showing predictable relationships.
• Model predictions aligned well with experimental findings on delay detection.

Conclusions:

• Delay detection thresholds in vented hearing devices can be systematically measured.
• Spectral artifacts are key factors influencing the perception of processing delays.
• Predictive models based on spectral changes can accurately estimate delay detection.