10:05 10000 Hz clean pure sine wave TEST TONE 10 khz frequency 0:29 【耳年齢チェック】55～59歳　10kHz 1:00 10000 Hz Test Tone 10:26 1kHz to 10kHz Audio Frequency Sweep Test Tone (10 Minutes) 1:01 10000Hz (10kHz) -20dB 0:36 20 - 20,000 Hz Audio Sweep | Range of Human Hearing 0:31 10000 Hz 10 kHz Sine Wave Sound Frequency Tone