A.1000~2000Hz
B.1000~4000Hz
C.2000~5000Hz
D.2000~8000Hz
E.5000~10000Hz
[单选题]音频的频率范围是A.20~2000HzB.27~2000HzC.2000~4000HzD.27~10000HzE.27~20000Hz
[单选题]噪声所致听力曲线图上的V形下陷常发生在A.500~2000HzB.1000~3000HzC.2000~5000HzD.3000~6000HzE.4000~8000Hz
[单选题]一般听力计所分的中频段是 ( )A.500~2000HzB.500~3000HzC.250~2000HzD.250~500HzE.2000~4000Hz
[单选题]超声的声波频率应该大于以下哪项 ( )A.2000HzB.5000HzC.10000HzD.20000HzE.50000Hz
[单选题]音频电疗法的频率范围为A.0~100HzB.100~1000HzC.1000~5000HzD.5000~10000HzE.10000~20000Hz
[单选题]音频电疗法的频率范围为A.0~100HzB.100~1000HzC.1000~5000HzD.5000~10000HzE.以上皆可
[单选题]音频电疗法的频率范围为A.0~500HzB.100~1000HzC.1000~5000HzD.5000~10000HzE.以上皆可
[单选题]人耳能听到的声波频率为A.20~2000HzB.20~20000HzC.200~2000HzD.2000~20000HzE.20~200000Hz
[单选题]超声的声波频率应大于A.2000HzB.20000HzC.50000HzD.5000HzE.10000Hz
[单选题]受噪声损害最早、最明显的听阈是A.1000HzB.2000HzC.4000HzD.6000HzE.8000Hz