audio frequency level 中文意思是什麼
audio frequency level
解釋
聲頻電平-
Experiments show that, when use msp430f149 audio sensor to identify vehicles that contain plane, tank, truck and so on by time domain features and two - level f - ratio, the recognition rate is 82. 1 % ; when use both msp430f149 audio sensor and arm9 sensor to identify vehicles, and the recognition rate is much better than the original system and msp430f149 audio sensor. line spectrum of power spectra and 3 / 2 spectrum is used as frequency features on arm9 sensor, and it is caught by narrow - band bandpass filter
實驗證明,在主頻為8mhz的msp430f149感知器上,採用基於時域特徵和二階f比的識別演算法,能夠實時地完成對飛機、坦克、卡車等交通工具的識別;將msp430f149感知器與基於arm9的高端感知器配合使用,且高端感知器採用功率譜線譜或3 / 2維譜線譜作為頻域識別特徵,能夠實時的對各類交通工具做更高性能的識別。 -
Relative audio - frequency intermodulation product level
相對音頻互調產物電平 -
Measurement of audio - frequency noise voltage level in sound broadcasting
聲音廣播中音頻噪聲電平的測定
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