Electroacoustic evaluation of pediatric-focused hearing assistive devices/systems in different digital signal transmission arrangements

Abstract

Pediatric-focused hearing assistive devices/systems (HADS) are intended to facilitate hearing by providing amplification of an acoustic signal and/or improving the signal-to-noise ratio (SNR) for children with hearing loss. Digital modulated (DM) signal transmission systems operate on a 2.4 GHz bandwidth and transmit signals directly from the speaker to the listener. Little is known about changes in electroacoustic performance of the hearing aid when receiving digital transmitted signals. The purpose of this study was to examine the electroacoustic characteristics of pediatric-focused HADS in three digital transmission arrangements with two transmitters and two behind-the-ear hearing aids. The three arrangements included (1) direct audio input (2) proprietary digital streaming, and (3) induction loop. Comparisons were made per ANSI/ASA S3.47 standard for measurement of HADS as well as the electroacoustic transparency based on 2011 American Academy of Audiology Clinical Practice Guidelines. Electroacoustic analysis across HADS in different digital transmission arrangements revealed variable results. Adjustments were necessary for some arrangements for optimal signal transmission. This supports the critical need of electroacoustic evaluation for HADS.Pediatric-focused hearing assistive devices/systems (HADS) are intended to facilitate hearing by providing amplification of an acoustic signal and/or improving the signal-to-noise ratio (SNR) for children with hearing loss. Digital modulated (DM) signal transmission systems operate on a 2.4 GHz bandwidth and transmit signals directly from the speaker to the listener. Little is known about changes in electroacoustic performance of the hearing aid when receiving digital transmitted signals. The purpose of this study was to examine the electroacoustic characteristics of pediatric-focused HADS in three digital transmission arrangements with two transmitters and two behind-the-ear hearing aids. The three arrangements included (1) direct audio input (2) proprietary digital streaming, and (3) induction loop. Comparisons were made per ANSI/ASA S3.47 standard for measurement of HADS as well as the electroacoustic transparency based on 2011 American Academy of Audiology Clinical Practice Guidelines. Electroacoustic...