Introduction The RF signal-to-noise ratio at the receiver input depends@ apart from other factors@ on audio frequency S/N ratio for a defined grade of performance. Since the majority of the physiological and psychological factors ultimately influence only the AF signal-to-noise ratio@ a series of subjective listening tests were carried out in India and the USSR to assess the minimum acceptable value of this ratio@ from which the equivalent RF signal-to-noise ratio at the input of the receiver may also be derived.
REPORT BS.1058-1986由ITU-R - International Telecommunication Union/ITU Radiocommunication Sector 发布于 1986-01-01,并于 2010-08-03 实施。
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