ISTS – Measuring Advanced Digital Hearing Aids

ISTS – A New Measurement Standard Proposal Hearing aids are currently measured using stationary signals, which include sine wave  frequency sweeps and unmodulated noise signals.  These test signals allow for reproducible measurement conditions and are described in ANSI 3.22 {{1}}[[1]] American National Standards Institute (ANSI ). ANSI S3.22-2003. Specification of hearing aid characteristics. New York:…

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Fourier Analysis and Its Role in Hearing Aids

Fourier Analysis and Transforms Spectrum analysis, also referred to as frequency domain analysis or spectral density estimation, is the technical process of decomposing a complex signal into simpler parts.  As described, many physical processes are best described as a sum of many individual frequency components.  Any process that quantifies the various amounts (e.g. amplitudes, powers,…

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