物體震動後,聲音能量往外擴散,並且隨著距離增加而遞減。此現象遵循:

聽力學導論

Quiz
•
Specialty
•
Professional Development
•
Hard
Su Hung
Used 4+ times
FREE Resource
10 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Hass 效應(Hass effect)
邊際效應(marginal effect)
Stenger 原理(Stenger principle)
反平方法則(inverse square law)
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
20 歲以內的正常聽人的聽覺頻率範圍為:
20~2000 Hz
20~4000 Hz
20~20000 Hz
40~4000 Hz
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
一個 10Hz 的波,它的週期為:
100 毫秒
10 毫秒
1 毫秒
0.1 毫秒
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
關於聲波的性質,下列敘述何者正確?
頻率是指一個波振動一次所需耗費的時間
音速與傳遞介質的密度有關,傳播介質密度越高,粒子之間距離越大,音速越快
當溫度增加時,傳播介質間的距離增加,音速也隨之變慢
低頻聲音傳播的距離較高頻聲音遠
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
有關分貝(dB)的相關敘述,下列何者錯誤?
某個聲音的音強水準為0 dB IL,表示此聲音的音量與參考值10的(-12)次方watt/m2 相當
某個聲音的聲壓水準為0 dB SPL,表示此聲音的音量與參考值2×10的(-5)次方Pa 相當
某人的聽力水準為0 dB HL,表示此人與正常年輕人的平均聽閾相當
一個發出50 dB SPL 的音箱,增加到四個音箱時,音量約為56 dB SPL
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
關於分貝(dB),下列敘述何者正確?
聲音A 的聲強(sound intensity)是聲音B 的兩倍,兩者相差6 dB
聲音A 的聲強(sound intensity)是聲音B 的十倍,兩者相差20 dB
聲音A 的聲壓(sound pressure)是聲音B 的兩倍,兩者相差3 dB
聲音A 的聲壓(sound pressure)是聲音B 的十倍,兩者相差20 dB
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
一般對話的音量在距離1 公尺處量到的音量大約是多少?
40 dB SPL
60 dB SPL
80 dB SPL
100 dB SPL
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