Over 360 million people worldwide suffer from disabling hearing loss. Most of them can be
treated with hearing aids. Unfortunately, performance with hearing aids and the benefit …

NAL-NL1, the first procedure from the National Acoustic Laboratories (NAL) for prescribing
nonlinear gain, was a purely theoretically derived formula aimed at maximizing speech …

Objectives: The hypothesis that extending the audible frequency bandwidth beyond the
range currently implemented in most hearing aids can improve speech understanding was …

Audiometric testing in research and in clinical settings rarely considers frequencies above 8
kHz. However, the sensitivity of young healthy ears extends to 20 kHz, and there is …

This article reviews the evolution of a series of models of loudness developed in Cambridge,
UK. The first model, applicable to stationary sounds, was based on modifications of the …

Background: Hearing loss caused by exposure to intense sounds usually has its greatest
effects on audiometric thresholds at 4 and 6 kHz. However, in several countries …

Various types of methods and approaches are available to predict the intelligibility of speech
signals, but many of these still suffer from two major problems: first, their required prior …

The benefit for speech intelligibility of extending the bandwidth of hearing aids was
assessed when the target speech (sentences) and background (two talkers) were co-located …

Purpose To assess the accuracy with which target insertion gains were matched for a single
type of open-fit hearing aid, both on initial fitting and after adjustment. Method The hearing …

Sound processing in the human auditory system is complex and highly non-linear, whereas
hearing aids (HAs) still rely on simplified descriptions of auditory processing or hearing loss …