acoustic path 中文意思是什麼
acoustic path
解釋
聲路程-
Then, introducing something about spread spectrum technique. and deciding to select direct - sequence spread spectrum ( ds ) in underwater acoustic communications by comparing ds to fh according to the properties of underwater acoustic channels. after that, discussing something about rake receiver, simulating the path - search algorithms, synchronization circuits and rake receiver in low speed underwater acoustic communications and analyzing some major factors influencing the performance of systems
然後介紹了rake接收技術的基本原理，並對rake接收系統中的路徑搜索和同步系統進行了討論和模擬分析，另外還對rake接收技術在低速水聲通信系統中的應用作了模擬分析，並討論了一些影響rake接收系統性能的主要因素。 -
The paper introduced the theory of passive acoustic localization and the algorithm of space acoustic localization. by use of combined acoustic path difference, the paper amended the passive acoustic localization formula and improved the accuracy of localization
本文介紹了被動聲定位的原理及空間聲定位的演算法，推導出了被動聲定位公式，並利用聲程差組合改進了被動聲定位公式，提高了定位的精度。 -
Tele - conference, video - conference. acoustic echo cancellation is normally achieved by means of an acoustic echo canceller, which, in its simplest form, consists of an adaptive filter which mimics the transfer function of the echo path ( or room acoustic ) to synthesize a replica of the echo, and then subtracts the estimation from the combined echo and near - end speech ( or disturbance ) signal to obtain the near - end signal alone
聲回波抵消通常採用聲回波抵消器來實現，最簡單的聲回波抵消器由自適應濾波器組成。具體方法是用自適應濾波器來估計回波信號，並從麥克風信號中減掉該估計值，從而實現聲回波的抵消。 -
So the acoustic wave is the only practical solution in this channel. an underwater acoustic channel is characterized as a multi - path channel due to signal reflections from the surface and the bottom of the sea. because of wave motion, the signal multi - path components undergo time - varying propagation delays that result in signal fading and inter - symbol interference ( isi )
本文從分析淺海水聲通道的傳輸特性入手，針對多途徑效應引起的幅度衰落及碼間干擾問題，提出一種適用於水聲e - mail通信的十六進制（或八進制）數字頻移鍵控（ mfsk ）傳輸系統。 -
Saw excitated by input idt is divided axisymmetrily ( y type ) or centrosymmetrily ( s type ) into two pathes and detected by their output idts. there is a mass loading area located accurately in each acoustic path and fabricated by photolithography technology in y type and s type mass loading sensor devices. as the characteristics of saw sensor are greatly influenced by temperature, these sensors have one acoustic path for reference another acoustic path for measurement in order to reduce the influence of temperature
它們各自具有一個輸入idt和兩個輸出idt 。輸入idt激發的saw經過耦合器按軸對稱（ y型）和中心對稱（ s型）分成兩路，分別由輸出idt檢測輸出。在y型和s型saw質量沉積效應傳感器件的傳播路徑上都有一個由光刻工藝精確定位的質量沉積區。 -
Then the important reference are provided for the optimal system design and technical parameters selecting of long - range underwater acoustic information transmission system. 2. the underwater acoustic channel model based on ray theory is studied, and in combination with the system function of coherent multi - path channel, the method for underwater acoustic channel response prediction through eigenrays finding is obtained
研究了基於聲線理論的水聲通道聲場模型，分析並模擬了在多種不同聲速條件下的聲線傳播以及不同海底狀況下的聲傳播；結合相干多途通道的系統函數，通過求取本徵聲線進行了水聲通道響應的預測。
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