| 释义 |
ˌundermoduˈlation Radio and Cinemat.
[under-1 10 b.]
Modulation that is less than it need be, so that the available capacity of a transmitter or medium is underused or the signal is too weak. So underˈmodulate v. trans., -ˈmodulated ppl. a.
1940Chambers's Techn. Dict. 877/1 Undermodulation. 1962A. Nisbett Technique Sound Studio v. 94 Programme meters... Its uses are:..(ii) to provide indications of levels which would result in under- or over-modulation at the recorder or transmitter. Ibid. 100 Reducing the effective service area of the transmitter by undermodulating a whole programme. 1974Listener 2 May 573/3 Why are the transmissions on Radio 3 invariably under-modulated? |