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Monday, July 8 • 15:30 - 18:00

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Despite the wearing of hearing protection, the number of acute acoustic trauma remains important. Machine guns, artillery, explosives and all kind of weapon systems used by soldiers especially during training exercises frequently induce hearing damage. French Army counts more than one thousand acute acoustic trauma every year. Nowadays, passive earplugs with nonlinear attenuation (level dependent) are increasingly used in Armies: they protect against impulsive noise while keeping contact with the useful sound environment. Nevertheless when they are in "open position" they do not protect against continuous noise. However, to reduce the number of acute acoustic trauma, it is obvious that noise attenuation should be maximized by taking care of the well-fitting of earplugs. This is the reason why ISL and the French Company Cotral Laboratory, specialized in high quality custom molded earplugs initiated a partnership to realize 30 prototypes of an intelligent earplug for assessment in military environment. This study is financially supported by French government (DGA) in a project named BANG (Bouchon Auriculaire de Nouvelle Génération). The intelligence of both the processing and diffusion algorithms for input and output sound signals is connected in one way to the ear via a custom molded earplug and to the communication equipment of the soldier in other way. Main functionalities of BANG are: i) high-quality passive protection, ii) active noise reduction, iii) reproduction of the sound environment at a controlled level, iv) check-up of the correct insertion of the protection during switch-on procedure, v) sound recording directly within the ear canal. Another capability is to realize in situ dosimetry during professional activities. In the near future, one important capability of BANG will be to use the microphones inserted in the custom molded earplugs (doublet right/Left ears) to improve acoustic detection of noises in the battlefield.

Monday July 8, 2019 15:30 - 18:00 EDT
St-Laurent 3, Board 11-B
  T06 Industr. and occup. Noise & vib., SS01 Hearing protection