聲阻抗率 的英文怎麼說
中文拼音 [shēngzǔkànglǜ]
聲阻抗率
英文
specific acoustic impedance-
The factors which affect the spl : the square measure of diaphragm, the amplitude of vibration, magnetic field intensity, power, impedance, resonant chamber, the pattern and the thickness of diaphragm, and the holes
音量會影響聲音大小的因素:膜片面積，振幅，磁場強度，功率，阻抗，音腔大小，膜片花紋/厚度，開孔Standard test method for impedance and absorption of acoustical materials using a tube, two microphones, and a digital frequency analysis system
管子雙擴音器和數字頻率分析系統用傳聲材料的阻抗和吸收的試驗方法Acoustics. testing of architectural acoustics. determination of sound absorption coefficient and impedance in a tube
聲學.駐波管法測定標準入射角聲阻抗和吸音率The input impedance of the interdigital saw transducer is measured by the equivalent circuit method. the experimental results show that the synchronized frequency of 9. 586 mhz, the acoustic radiation resistance of 44. 6 and the static electrode capacity of 194pf all agree with those design values
用自行設計的等效電路測量方案，測量了表面彈性波馬達換能器的輸入阻抗，實驗結果顯示表面彈性波換能器的共振頻率為9 . 586mhz ，輻射聲電阻為44 . 6 ，叉指電極靜電容為194pf 。The system can resolve the noise and impedance on the power line and obviously improve the abilities of anti - disturbance and successful rate of communication. at the same time, the software realy method and arithmetic is also introduced to settle the problem of attenuation and increase the distance of carrier communication, it can satisfy the need of remote reading meter system
該系統有效地克服了電力線噪聲和阻抗變化等干擾因素，提高了抗干擾能力和通信成功率，同時提出軟體中繼的思想和演算法並加以實現，進一步抑制了線路衰減快的問題，使載波通信的距離增加，滿足了遠程抄表系統的要求。But to circular plate with large surface area, the vibrate modes generated is often so high that there is reverse phases existing, which result in a decrease in radiation impedance, electric - acoustic efficiency and the electric power, as well as poor directivity
然而對于輻射面積較大的彎曲振動圓盤，一般激勵的振動階數比較高，因此存在彎曲振動的反相區，導致換能器的輻射阻抗下降，電聲效率和聲功率降低以及指向性變差等問題。Unit area acoustic impedance
聲阻抗率Specific acoustic impedance
聲阻抗率Code for measurement of sound - absorbing coefficient and specific acoustic inpedance of standing - wave
駐波管法吸聲系數與聲阻抗率測量規范Measurement of sound - absorbing coefficient and sound - resistance rate by method of standing wave tubes
駐波管法吸聲系數與聲阻抗率測量規范To provide a method that can be used to predict single or multi - layered microperforated panel ( mpp ) performance precisely, especially when the mpp has holes of different diameter and irregular shape
摘要提出用實驗測得含不同孔徑孔的微孔板聲阻抗率來預測由其形成的單層或多層微孔板的吸聲特性，並用傳遞矩陣法來預測該微孔板的各種組合結構的整體吸聲性能。The analytical mode is based on the theory of sound propagation in layered media. the concept of equivalent parameters is established. the absorption of sound energy by damping layer ' s is represented by use of complex sound impedance
解析模型以分層介質中的波動理論為基礎，建立了等效參數的概念，並運用聲阻抗的復數表示法把阻尼層對介質層聲能吸收的影響都考慮進去，通過比較敷設消聲覆蓋層前後多層傳遞損失的差異來獲得消聲層的效率。Acoustics - determination of sound absorption coefficient and impedance in impedance tubes - method using standing wave ratio
聲學.阻抗管中吸音率和阻抗的測定.駐波比率法Acoustics - determination of sound absorption coefficient and impedance in impedance tubes - part 1 : method using standing wave ratio
聲學.阻抗管中吸聲系數和阻抗測定.第1部分:駐波比率法When tested with two saw filters whose center frequencies are 155mhz and 163mhz respectively, the ic completed the summing function of input signals, while the 5db bandwidth expands by about 10mhz. and the variation of the matched impedance caused by the ic is small enough to be ignored
在對中心頻率分別為155mhz和163mhz的聲表面波濾波器進行加權控制的測試中，該電路實現了信號的疊加功能，輸出信號的5db帶寬展寬約10mhz ，且電路引起阻抗匹配的變化小。System scheme of speech coding plus spread spectrum communication was presented based on a full analysis of noise characteristic, attenuation characteristic and impedance characteristic of low - voltage power line. spread spectrum carrier ( abbreviated as ssc ) technology is adopted to overcome problems existing in signal transmission over power line. high quality, low rate mbe compression algorithm was used to complete speech encoding and decoding
在對低壓電力線路的噪聲特性、衰減特性和阻抗特性三個方面充分分析的基礎上，本文提出一種語音編碼+擴頻傳輸的系統總體方案，採用擴頻載波（ spreadspectrumcarrier ，縮寫為ssc ）技術克服電力線傳輸信號存在的問題，採用語音合成質量高並具有較低碼率的mbe壓縮演算法完成語音信號的編解碼。This becomes increasingly critical as systems are being designed to combine circuits operating at lower power ( implying higher impedance levels ), higher speed ( implying lower nodal stray capacitance, faster edges, and higher frequencies ), and higher resolution ( much less output noise permitted )
當今的電子系統常常包含著低功耗（意味著阻抗更高） 、高速度（節點寄生電容更小、信號邊沿更陡峭、信號頻率更高）和高分辨力（噪聲容限更小）等電路，因此這個問題尤其應該引起重視。Two types of power amplifier for measuring speaker impedance curve were analysed
摘要分析了2種應用於測量揚聲器阻抗曲線的功率放大器。Presents the simple but highly reliable on - line detection of ultrasonic transducer clamping capacitance based on the impedance circuit model constructed through the impedance characteristics of the ultrasonic transducer under triple harmonics, and concludes from experimental results that this method can be used to effectively detect the variation of clamping capacitance while the transducer is operating, and the matching inductance can be dynamically regulated according to the results of detection, and dynamic matching can therefore be achieved in the real sense at the end of the transducer to improve the overall performance of the whole system
為了解決大功率超聲應用的換能器電端匹配問題，分析了超聲波換能器在諧振頻率三次諧波下的阻抗特性，給出了超聲換能器三次諧波下的阻抗電路模型.並根據阻抗電路模型建立了對超聲換能器的夾持電容實現在線檢測簡單、可靠性高的方法，實驗證明該方法有效的.該方法可以在換能器工作過程中隨時檢測夾持電容的變化，根據檢測結果對匹配電感進行動態調整，實現真正意義上的換能器電端的動態匹配，從而大大改善匹配質量，提高系統的工作性能Transistor hi - fi power amplifier, the output impedance is low, can actuate the speaker well
高速晶體管hi - fi功率放大器，輸出阻抗低，能更好地驅動揚聲器。分享友人