Real-time method for measurement of noise exposure from sources in close proximity to the ear

Authors

  • H. Kunov Inst. of Biomed. Eng., Toronto Univ., Ont., Canada
  • H. Dajani Inst. of Biomed. Eng., Toronto Univ., Ont., Canada
  • B. Seshagiri

Keywords:

acoustic noise measurement, communication headsets, noise exposure standards, acousto-mechanical model, human head, sound level meter, equivalent free-field sound levels, environmental noise

Abstract

Sound sources close to the ear, such as communication headsets present a special challenge when it comes to the measurement of the sound exposure. This is due to two facts: firstly, it is very difficult to obtain precision measurements of the sound field in a person's ear, secondly, noise exposure standards refer to sound measured in a `free' field, i.e., in the place where the ear would normally be found, but with the listener removed. In order to obtain data for exposure that can be interpreted in terms of conventional standards and codes, the authors developed a method based on an accurate acousto-mechanical model of the human head (ATF, Acoustic Test Fixture) (Kunov, Giguere and Simpson, 1989; Kunov, 1989). With the help of the ATF, a sound level meter, and an attached filter it is possible to read the equivalent free-field sound levels from a communications headset or any other source in close proximity to the ear, including any environmental noise that finds its way into the ear canal. This can be done for any type of device, including insert headsets. In particular there was an interest in obtaining a sample of measurements of the noise exposure of workers who use communication headsets under very different working conditions, and with different headsets, environmental noise, etc

Published

1993-09-01

How to Cite

1.
Kunov H, Dajani H, Seshagiri B. Real-time method for measurement of noise exposure from sources in close proximity to the ear. Canadian Acoustics [Internet]. 1993Sep.1 [cited 2021Apr.14];21(3):23-4. Available from: https://jcaa.caa-aca.ca/index.php/jcaa/article/view/756

Issue

Vol. 21 No. 3 (1993)

Section

Proceedings of the Acoustics Week in Canada

Copyright on articles is held by the author(s). The corresponding author has the right to grant on behalf of all authors and does grant on behalf of all authors, a worldwide exclusive licence (or non-exclusive license for government employees) to the Publishers and its licensees in perpetuity, in all forms, formats and media (whether known now or created in the future)
i)    to publish, reproduce, distribute, display and store the Contribution;
ii)    to translate the Contribution into other languages, create adaptations, reprints, include within collections and create summaries, extracts and/or, abstracts of the Contribution;
iii)    to exploit all subsidiary rights in the Contribution,
iv)    to provide the inclusion of electronic links from the Contribution to third party material where-ever it may be located;
v)    to licence any third party to do any or all of the above.