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1kHz to 18 kHz High frequency sine wave test tone

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High-frequency sine wave speaker test tone from 1 kHz to 18 kHz for an audio lover who want to test his/her sound system and hearing ability vs frequency. Each frequency duration is 3 seconds. The video contains wave pattern too.
If you use this video as hearing test tone you must use good quality headphones because laptop loudspeaker frequency responds not good both low and high frequencies
BEWARE: LOWER YOUR VOLUME FIRST OR YOUR EARS WILL EXPLODE!!!
If you use this video as hearing test tone you must use good quality headphones because laptop loudspeaker frequency responds not good both low and high frequencies
BEWARE: LOWER YOUR VOLUME FIRST OR YOUR EARS WILL EXPLODE!!!
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