頁籤選單縮合
| 題 名 | 無響室音場特性之分析 |
|---|---|
| 作 者 | 劉德源; | 書刊名 | 中華民國音響學刊 |
| 卷 期 | 1:1 1990.06[民79.06] |
| 頁 次 | 頁67-75 |
| 分類號 | 334.6 |
| 關鍵詞 | 無響室; 音場; |
| 語 文 | 中文(Chinese) |
| 中文摘要 | 本文係在無響室內,對不同位置之音源(揚聲器),藉著各種頻率的變化所發出 音量的傳播分析,其方法如下: 1. 固定音源、移動麥克風。 不考慮空氣吸音影響,採用點音源的音壓振幅與至音源中心之 測距成反比之特性,藉著音壓振幅相對於平均音壓振幅之偏差的計算,可了解因各種頻率及 測距遠近受邊牆之反射情況。 2. 固定音源與麥克風二者之間距,並同時在音場中移動。 在某一頻率下,可量測並計算出 各測點中有一音壓振幅相對於平均音壓振幅為最大偏差。同時由其餘測點之偏差,亦可了解 受到邊牆之反射影響。 由以上之量測分析,可供爾後選擇較佳之實驗佈置方式及適當之頻率範圍。 |
| 英文摘要 | In this paper, we analyze the acoustic propagation with varied frequencies which are produced by the loudspeaker in the anechoic chamber. The analytic methods as following: 1. The sound source is fixed when the microphone is moving. To ignore the absorption of sound in air, the point sound source characteristic is the sound pressure amplitude proportion to the distance between the measuring point and the acoustic center. the reflection due to the walls effect can be observed from the calculation of deviation for the sound pressure amplitude with respect to the average sound pressure amplitude under varied frequencies and any measuring distance. 2. Both the sound source and the microphone are simultaneosly moved with constant spacer. The maximum deviation of the sound pressure amplitude with respect to the average sound pressure amplitude among the measuring points can be found. The walls effect will be also discussed. The measurement and the analysis between these two methods can give us to select the proper frequency range and the better experiment arrangment. |
本系統中英文摘要資訊取自各篇刊載內容。