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Spectral density


Limit as the bandwidth of frequencies approaches zero of the root mean square value of a quantity in the sound field divided by the bandwidth. The type of quantity (sound pressure, vibrational velocity, etc.) must be specified [IEC 50 (801)]

Source: "State System for Ensuring Uniformity of Measurements. Hydroacoustic Measurements. Terms and Definitions. GOST R 50.2.037-2004"

(approved by the Decree of Gosstandart Russia dated February 11, 2004 No. 55-st)

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