- acoustical circuit
- 声路
English-Chinese electricity dictionary (电气专业词典). 2013.
English-Chinese electricity dictionary (电气专业词典). 2013.
Compression driver — A compression driver is a type of loudspeaker driver which uses the technique of compression to achieve high efficiencies. In this context compression refers to the fact that the area of the loudspeaker diaphragm is significantly larger than the… … Wikipedia
electronic music — electronically produced sounds recorded on tape and arranged by the composer to form a musical composition. [1930 35] * * * Any music involving electronic processing (e.g., recording and editing on tape) and whose reproduction involves the use of … Universalium
Mechanical filter — Figure 1. A mechanical filter made by the Kokusai Electric Company intended for selecting the narrow 2 kHz bandwidth signals in SSB radio receivers. It operates at 455 kHz, a common IF for these receivers, and is dimensioned 45×15×15 mm ( … Wikipedia
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resonance — /rez euh neuhns/, n. 1. the state or quality of being resonant. 2. the prolongation of sound by reflection; reverberation. 3. Phonet. a. amplification of the range of audibility of any source of speech sounds, esp. of phonation, by various… … Universalium
Sound from ultrasound — Contents 1 Parametric array 2 Applications 2.1 Commercial advertising … Wikipedia
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History of radar — The history of radar starts with experiments by Heinrich Hertz in the late 19th century that showed that radio waves were reflected by metallic objects. This possibility was suggested in James Clerk Maxwell s seminal work on electromagnetism.… … Wikipedia
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Measurement microphone calibration — In order to take a scientific measurement with a microphone, its precise sensitivity must be known (in volts per Pascal). Since this may change over the lifetime of the device, it is necessary to regularly calibrate measurement microphones. This… … Wikipedia