Description
Since the late 1940s, when the term “hi fi” was first applied to high-quality (high fidelity) sound reproduction systems, it has been conventionally accepted that the range of human hearing has an upper limit of about 15 to 20 kHz.
The signal used to measure this response is an artificially‐generated sine wave. However, modern research and long term experience working with High Fidelity systems now question this firmly held belief. Harmonically rich, highly transient, real‐life sounds extend well beyond 20 kHz; for example, the muted trumpet has a frequency response extending to beyond 100 kHz.
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