The negative effect of amplitude compression in multichannel hearing aids in the light of the modulation transfer funtion

The article deals with the question of why multichannel amplitude compression appears to have a negative rather than a positive effect no speech intelligibility by hearing-impaired listeners. It is argued that the small time constants of amplitude compression diminish the temporal as well as the spectral contrasts in the speech signal. According...

Gehoorschade door lawaai; I. Analyse van onderzoekgegevens ter bepaling van de relatie tussen lawaai en gehoorschade door lawaai

Gehoorschade door lawaai; II. Methoden om op individueel en groepsniveau gebruik te maken van het verband tussen lawaai en gehoorschade door lawaai

Effects of acute noise traumata on whole-nerve and single-unit activity

Some preliminary results of a research program on the effects of noise traumata on cochlear functioning are given. Measurements reported here include: the latency of the whole-nerve (compound) action potential (AP), the selectivity of frequency-tuning curves (e.g., the Q10-values) measured for the AP (with a forward-masking technique) and for...

Tussen spreken en verstaan - een nieuwe meetmethode

Occupational hearing loss: Spread in hearing levels of people exposed to fluctuating noise

Some effects of cognitive similarity on proactive and retriactive interference in short-term memory

An experiment is reported on the effects of cognitive similarity on proactive and retroactive interference (PI, RI) in short term memory. To avoid confounding between cognitive and acoustic similarity, the materials - i.e. words and digits - were matched with respect to vowel pattern. Effects of both PI and RI were found on recall of words,...

Relation between audiological findings and complaints by Persons suffering from noise-induced hearing loss

In this article the author points out that, in the case of perceptive deafness (sensorineural involvement), hearing loss for understanding of conversational speech cannot be determined by means of pure-tone audiometric testing. Some years ago a survey was performed in The Netherlands, its aim being to provide industrial medical officers with a...

Addition phenomena in vision and hearing

Studies on the threshold perception - first in the field of vision, later also in the field of hearing - have been a substantial part of the Institute's research programme from the beginning. Since only a few investigators had experience in both fields, an attempt to compare methods and results has never been made. The present author, one of...