Document ID (ISN) | 42728 |
CIS number |
84-1565 |
ISSN - Serial title |
0174-1098 - Zeitschrift für Lärmbekämpfung |
Year |
1984 |
Convention or series no. |
|
Author(s) |
Ferekidis E., Papafrangos K., Adamopoulos G., Pantazopoulos P. |
Title |
New objective measuring method for testing hearing protectors |
Original title |
Eine neues objektives Messverfahren bei der Prüfung von Gehörschützern [in German] |
Bibliographic information |
1984, Vol.32, No.3, p.63-66. Illus. 6 ref. |
Abstract |
In addition to comfort and worker acceptance, attenuation is a decisive property in the choice of hearing protectors. Attenuation of sound reaching one (test) ear can be determined by measuring the stapedius reflex of the other (reference) ear. This reflex is a movement of the eardrum caused by contraction of the muscles of the inner ear; it can be measured by plugging the reference ear with a pressure-sensing device. Results with and without various protective devices (medical cotton, glass fibre earplugs, wax earplugs) in the test ear showed that the threshold of the stapedius reflex increases with increasing attenuation, but also with the frequency of the applied sound (500-4000Hz). The advantages of the method are that it does not require judgements by the person being tested, and does not require expensive auxiliary facilities such as special testing chambers. |
Descriptors (primary) |
hearing protection; noise; ear; hearing threshold; sound attenuation |
Descriptors (secondary) |
evaluation of equipment; sound transmission loss; hearing conservation; human experiments; earplugs |
Document type |
D - Periodical articles |
Subject(s) |
Noise, hearing and vibration
|
Broad subject area(s) |
|
Browse category(ies) |
Noise Hearing protection
|