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  Paylas   Hesabat !   Aciqlama

This is a tone sweep from 500 Htz to 20 Htz. Most laptop speakers can't get the 100 htz, my moderately high-quality speakers can get down to 75 Htz, and most larger headphones can go to 30. You can't hear 20 htz and under, no matter how loud. All of these tones are sine waves.


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