acoustical frequency 中文意思是什麼
acoustical frequency
解釋
聲頻- acoustical : adj. 1. 聽覺的；聲學的。2. 助聽的；傳音的。3. 原聲的，不經過電子設備傳聲的。adv. -tically 在聽覺上；在聲學上。
- 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。
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This paper mainly discusses the designing and testing method to the dds acousto - optic mode locking. it also makes some further analysis on the critical technology - - - - - - the transducer acoustical membrane matching and transducer thinning, which can directly affect the performance of acousto - optic elements. it then analyses the heat effect of acousto - optic elements and the technology of transducer thinning by developing ion - beam sputtering of high frequency acousto - optic elements
本文重點討論了dds聲光鎖模器的設計及測試方法，討論和分析了影響聲光器件性能的關鍵工藝換能器聲學膜層匹配和換能器減薄工藝，對聲光器件的熱效應進行了測試分析，對離子刻蝕法聲光換能器減薄新工藝作了一定的探討。 -
Investigation on low - frequency measurement method of sound insulation for underwater acoustical material
水聲材料低頻隔聲測試研究 -
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 -
Preferred frequencies, frequency levels, and band numbers for acoustical measurements
聲學測量的優先選擇頻率頻率級和頻帶數 -
The paper produces noise reduction measurements and major frequency coverage that is 200 ~ 2khz to be used in selection of acoustical absorption and sound insulation materials. the measurement produces self - contained data to design lower noise railway vehicles in the future
本次測試的車輛車內噪聲主頻帶為20 2khz ，可依據此頻段進行新型車的設計和車體內部隔聲吸聲材料的選擇。 -
Recommendations for specifying and testing the susceptibility of acoustical instruments to radiated radio - frequency electromagnetic fields, 25 mhz to 1ghz
25mhz至1ghz輻射射頻電磁場聲學儀器的敏感性的規范和檢測推薦方法 -
In a paper about to be published in the journal of the acoustical society of america, dr declercq and ms dekeyser calculate how each frequency of sound behaves as it diffracts off the rows of seats
他們計算出了各種頻率的聲音掠過這些凳子時所產生的不同效果，關于這項研究的論文不久將在一本美國聲學界期刊上發表。 -
Time - frequency analyze acoustical signals of pests in stored grain by matlab
軟體實現儲糧害蟲聲信號的時頻分析 -
The technique of the acoustical design of anechoic coatings is one of the most important parts. the design of anechoic coatings which are effective anechoic at low frequency and broad band is an especially difficult problem
消聲層的聲學設計是其重要的組成部分之一，特別是消聲層已經向低頻寬帶發展，長期以來一直是水下消聲降噪領域的一個難題。
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