Jc. Bera et M. Sunyach, DIGITAL IIR FILTER APPLIED TO ACTIVE INDI VIDUAL HEARING PROTECTOR, Comptes rendus de l'Academie des sciences. Serie II. Mecanique, physique, chimie, astronomie, 320(8), 1995, pp. 403-406
Current active individual hearing protectors are electrodynamic headse
ts driven by simple analog filters. The active attenuation, of these p
rotectors is limited to low frequency components of noise. This Study
proposes digital filtering in the development of more complex filters
which in particular can accomodate various antinoise sources. Such a f
iltering system has been constructed and its behaviour is discussed in
light of results of a sample application.