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This book is devoted to the acoustical principles that underlie the design and fitting of hearing aids. It includes coverage of basic acoustics, including a full, but mostly nonmathematical discussion of the decibel unit, air-coulmn and Helmoltz acoustical resonance, horns, the effect of the acoustical transmission path of the ear on hearing-aid response, psychoacoustics, amplification systems of hearing aids (including signal processing and class D and digital circuitry), and noise-reduction system. These subjects are discussed in terms of their specific applications to the design and fitting of hearing aids. The book presents the information in simple understandable terms.
The book contains black-and-white illustrations.
The Sound Wave. The Measurement of Sound: Octaves and Bells. Acoustic Resonators. Horns. The Acoustical Transmission Path of the Ear. Pyschoacoustics. Music and Speech. Amplification. Signal Processing. Noise. Index.