Impulse Noise: Measurement Techniques and Hearing Protector Performance Report on Scientific Exchange at the French-German Research Institute of Saint-Louis

Bruit Impulsif - Techniques de Mesure et Rendement des Dispositifs de Protection Auditive - Rapport d'Échange Scientifique à l'Institut Franco Allemand de Recherches de Saint-Louis


  1. Nakashima, A.
  2. Buck, K.
  3. Hamery, P.
  4. Brom, G.
Corporate Authors
Defence R&D Canada - Toronto, Toronto ONT (CAN)
Measurements of impulse noise and the performance of several hearing protection devices were made in Saint-Louis and Baldersheim, France sponsored by the French-German Research Institute of Saint-Louis (ISL) in August 2006. Hearing protector performance was evaluated using an acoustic test fixture that was designed by ISL. Impulse noises with peak levels from 110 to 190 dB were produced by detonation of explosives. The noise attenuation achieved by a Peltor communications headset (MT15H68 FB 950) and a Peltor Optime III earmuff was measured alone and in combination with a Bilsom nonlinear earplug (Model 655). The Peltor Optime III provided slightly more attenuation than the communications headset up to about 2 kHz. When used in the combination with the earplug, similar attenuation was achieved for the two devices. A prototype AEARO earplug was also tested in the blast noise, and was found to provide good attenuation at low frequencies when used in the nonlinear mode. The performance of the Nacre QuietPro active earplug system was measured in pink noise of 85, 90 and 95 dB. The device provided good attenuation in the passive mode and adequate protection in the push-to-talk (PTT) modes. It is expected that the work performed will lead to future collaborations between DRDC Toronto and ISL in the area of protection from impulse noise and blasts.

Il y a un résumé en français ici.

Impulse noise;Blast noise;Hearing protection devices
Report Number
DRDC-TORONTO-TM-2006-231 — Technical Memorandum
Date of publication
01 Oct 2006
Number of Pages
Electronic Document(PDF)

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