Transcription of 噪音危害預防 - nfuee.nfu.edu.tw
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噪音危害預防 - nfuee.nfu.edu.tw
2005/10/15 1. 1.. / . (second/per cycle) .. ( ) . / . (Hz).. 2005/10/15 2.. ( . ) .. 1.. 20 20000Hz 2.. 20Hz 3.. 20000Hz . 2005/10/15 3.. 2005/10/15 4. (1/3).. 2005/10/15 5. (2/3).. 5000 m/s 1500 m/s 300 m/s 2005/10/15 6. (1/2).. 2005/10/15 7. (2/2).. ~ cm . 3000Hz .. 2005/10/15 8.. ( ).. 2005/10/15 9.. 2005/10/15 10.. ( ) .. 2005/10/15 11. (1/2).. 90dB . 80~120 dB .. 2005/10/15 12. (2/2).. A 90 dB . 2005/10/15 13.. A .. B .. C .. D .. 2005/10/15 14.. ( . ) . 40 % . 2005/10/15 15.. A . 65~75 dB 80 dB.. 2005/10/15 16.. 2005/10/15 17. 2.. 2005/10/15 18.. (Hearing Loss) . ( . ) .. 4000. Hz . 2005/10/15 19. ( ).. 22 .. 2005/10/15 20. ( ).. 1. (Sensorineural Hearing Loss).. a.. b.. c. ( Presbycusis). 2. (Conductive Hearing Loss) .. 2005/10/15 21.. (Temporary Threshold Shift TTS) .. 2005/10/15 22.. (Permanent Threshold Shift, PTS) .. 4000 Hz . 4000 Hz .. 2005/10/15 23. ( ). (PTS) .. 2005/10/15 24.. ( . Presbycusis) .. 2005/10/15 25. ? 1.. 2.
2005/10/15 3 1.1 聲音的來源與分類 • 聲音是指任何一種壓力的變化(來自物體或分子的 振動)，經由水、空氣或其他介質的傳播，能被人
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