Abstract
Many measurements are concerned with the ratio of two similar quantities — for example, when measuring the gain or loss of an item of equipment or a network — and the most usual unit is that of the bel (or its subunit the decibel) after Alexander Graham Bell who patented the telephone. The bel is equal to the logarithm to the base ten of the power ratio, thus
where N is the number of bels and P1 and P2 represent the values of power.
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© 1976 A. Simpson
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Simpson, A. (1976). Logarithmic Units. In: Testing Methods and Reliability — Power. Palgrave, London. https://doi.org/10.1007/978-1-349-02629-6_4
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DOI: https://doi.org/10.1007/978-1-349-02629-6_4
Publisher Name: Palgrave, London
Print ISBN: 978-1-349-02631-9
Online ISBN: 978-1-349-02629-6
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