audio frequency band 中文意思是什麼

audio frequency band 解釋
聲頻頻帶
  • audio : adj. 【無線電】聽覺的，聲音的，音頻的；成音的。
  • frequency : n. 1. 屢次，頻仍，頻繁。2. （脈搏等的）次數，出現率；頻度；【物理學】頻率，周率。
  • band : n 1 帶，繩；帶形物；箍；箍條；嵌條；鑲邊；鋸條； 〈pl 〉 （法官等的）寬領帶。2 束縛，羈絆；義務；...
  1. 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。
  2. Methods of measurements of audio - frequency band and simulated systems for selective calling equipment used in the mobile services

    移動通信選擇呼叫設備音頻段和模擬系統測量方法
  3. The relative development mature ( uses the l wave band ) face the digital audio frequency service satellite numeral audio frequency broadcast technology beginning, because designs aims at the mobile subscriber, has solved the mobile subscriber receive numeral audio frequency broadcast problem well

    相對發展成熟的面向數字音頻服務的衛星數字音頻廣播技術（使用l波段） ，由於設計之初就針對移動用戶，較好地解決了移動用戶接收數字音頻廣播的問題。
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