次声- 1-20赫兹 - [日志扫描](Infrasound - 1-20hz - [log sweep]) 500赫兹 - 4纯正弦波形听力测试 - 20 秒(500Hz - 4kHz Pure Sinusoid Waveform - Hearing Test - 20 Seconds) 1K赫兹 - 25纯正弦波形听力测试 - 20 秒(1kHz - 25kHz Pure Sinusoid Waveform - Hearing Test - 20 Seconds) 20...