db level 中文意思是什麼

db level 解釋
分貝噪聲級
  • db : 并行插口
  • level : n 1 水平儀，水準儀；水準測量。2 水平線，水平面；水平狀態；平面，平地。3 水平，水準；水位；標準；...
  1. Phono level 2 87 db line in 86 db

    可在phono及線級訊號間切換
  2. The nco limits are measured via the 30 - minute equivalent level in unit of a - weighted decibels ( db ( a ) ), which is a commonly used international standard

    該條例所訂的聲量上限是以每三十分鐘時段內的平均噪音能量水平量度，以a加權分貝值為單位（分貝（ a ） ） ，該準則為國際普遍採用的標準。
  3. The level at some particular point is the gain or loss of power, expressed in decibels ( db ) between that point and some arbitrary reference point

    某一特定點的電平是指該點和某一任意參考點之間的功率增益或損耗，用分貝表示。
  4. The predicted noise level is at least 1 db more than the prevailing traffic noise level at the time before the works to construct the road were commenced

    預測中的新建道路噪音水平必須最少比該區在建路工程進行之前的交通噪音聲級高1分貝a 。
  5. 22 paired inferior collicular neurons were obtained in the experiment. the neurons were recorded in the depth of 198 - 1254 u m ( 544. 59 ? 72. 37 n m, m + sd ), and their bfs were 11. 25 - 59. 29 khz ( 26. 77 + 9. 95 khz, m ? d ) : the minimum thresholds ( mts ) werelo - 66 db spl ( 38. 14 ? 14. 39 khz, m + sd ) ; the latencies were 4. 0 - 16. 0 ms ( 8. 19 + 3. 14 ms, m + sd ) ; the best intervals between paired sound pulses were 0. 01 - 28. 71 ms ( 3. 93 + 2. 52 ms, m ? d ) 0 the results showed : l ) there were interactions between the neurons in the iso - frequency lamina and hetero - frequency lamina which included mutual inhibition ( 18 / 22, 81. 8 % ) and mutual facilitation ( 4 / 22, 18. 2 % ), and the mutual inhibition in iso - frequency lamina was stronger than that in hetero - frequency lamina ; 2 ) the mutual inhibition decreased with sound level increasing ( p < 0. 001, anova ) ; 3 ) the analysis of the inhibition of discharge rate at lodb above mt showed that the inhibition increased when the paired neurons " bfs difference decreased ( r = - 0. 545, p = 0. 0006 ) ; 4 ) the mutual inhibition of paired neurons can sharpen the frequency tuning and the effect increased when the frequency was away from the bf ; 5 ) the changes in q10, q30 decreased with bfs difference of the paired neurons increasing ; 6 ) the mutual facilitation between paired neurons not only increased discharge rate, but also widened the frequency tuning, i. e., increased response frequency

    結果表明： 1 ）同頻層神經元之間或者非同頻層之間神經元之間存在相互作用，這種作用既有相互抑制（ 18對，佔81 . 8 ） ，也有相互易化（ 4對，佔18 . 2 ） ，且同頻層神經元之間的相互抑制作用較非同頻層神經元之間的相互抑制作用要強； 2 ）神經元對低刺激強度反應時，所受到的相互抑制作用較強，隨著聲刺激強度加大，抑制作用逐步降低（ p 0 . 001 ， anova ） ； 3 ）對閾上10db放電率抑制百分比進行的分析顯示，配對神經元之間的最佳頻率差越小，相互抑制作用越強（ r = - 0 . 545 ， p = 0 . 0006 ） ； 4 ）配對神經元之間通過相互抑制作用可表kx碩士學位論文waiaster 』 sthesis現出調諧銳化作用，該作用的效率與頻率有關， bf處的銳化作用較低，偏離bf時其銳化作用逐步加強； 5 ）頻率銳化作用的效率與bf差有關，隨著配對神經元之間的bf差擴亢q10 ， q30值的變化逐漸減小，其變化百分比與配對神經元之間的頻率差存在明顯相關； 6 ）配對神經元之間的相互易化作用不僅表現在放電率增加上，也表現在頻率調諧曲線的擴寬，即頻率響應范圍擴大。
  6. The sound quality of the appliance has become a significant component in the purchaser ' s overall subjective evaluation. the sound of the appliance used to be evaluated by the noise level measured in db ( a ). however, in some cases, the noise level measured in db ( a ) ca n ' t match the feeling of people

    根據有關國家標準，家用電器的噪聲通常採用a計權進行測量，但在某些情況下應用a計權測量的結果有可能不夠確切：在一些情況下，某些產品a聲級並不高，用戶卻抱怨噪聲太吵；而在另一些情況下，盡管其a聲級比較高，但用戶卻可以接受。
  7. Accuracy reference level : 2 db

    精度參考電平
  8. By default, odbc and ole db clients issue a connection - level set statement setting ansi nulls to on for the session when connecting to an instance of sql server

    默認情況下，當連接到sql server的實例時， odbc和ole db客戶端發出連接級set語句，以將會話的ansi _ nulls設置為on 。
  9. By default, odbc and ole db clients issue a connection - level set statement setting ansi padding to on for the session when connecting to an instance of sql server

    默認情況下，當連接到sql server的實例時， odbc和ole db客戶端發出連接級set語句，將會話的ansi _ padding設置為on 。
  10. By default, odbc and ole db clients issue a connection - level set statement setting ansi warnings to on for the session when connecting to an instance of sql server

    默認情況下，當連接到sql server的實例時， odbc和ole db客戶端發出連接級set語句，將會話的ansi _ warnings設置為on 。
  11. Audible noise level : meets the 70 db noise exposure limit

    -可聽到的噪音水平：符合70分貝a噪音暴露限制要求
  12. Audible noise level : meets the 82 db noise exposure limit

    -可聽到的噪音水平：符合82分貝a噪音暴露限制要求
  13. And critical techniques like ka waveband solid - state circuit designing and structure machine designing are mastered. finally, our 8mm pa has an output power level of 25. 6dbm, a 11. 5 - db power gain and 13. 1 % power - added efficiency ( pae ), which meet our design requirements

    其中，在毫米波功率放大技術中，著重解決了因晶元體積小而產生的設計加工難度較大的問題，突破ka波段高效固態電路設計和結構工藝設計等關鍵技術，實現了毫米波功率放大器的製作。
  14. Without any control, the noise level outside the engine room can be 70 to 80 db ( a ) or even higher. homemade dgeu of the same power produces more noises

    在不經過治理的情況下，機房外環境噪聲為70 ~ 80db （ a ）或更高，相同功率參數的國產機組噪聲則更大些。
  15. Based on these advantages we analyze the performance of constant - power variable - rate m - qam schemes for spectrally efficient data transmission over nmf channels. by introducing the adaptive modulation approach, we gain two things : 1 ) the error rate is kept at a constant level. 2 ) the achievable spectral efficiency comes within 5 db of the shannon capacity limit. at the last chapter, the presentation of a single base station and a single mobile scenario proved the feasibility of adaptive schemes

    然後作者的精力轉入通道的自適應方案的研究中，首先通過研究發現nakagami衰落因子的適當調整可以近似於常見的瑞利衰落和萊斯衰落，接著研究在無線通道中採用三種不同自適應方案時的通道容量，研究表明速率的調整是增加通道容量的關鍵，在此基礎上，著重研究了離散變速率qam的情況，表明這種調制方案無論在頻帶利用率還是在系統平均誤碼率比其它情況提高很多。
  16. All db - library values must be set correctly either at the server level by using

    在服務器級別或使用set命令從應用程序中正確設置所有db - library值。
  17. The contribution to the increase in the overall noise level from the new road must be at least 1 db

    新建道路噪音導致整體噪音聲級的升幅最少需達1分貝a 。
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