10:05 315 Hz clean pure sine wave TEST TONE frequency 1:03 315 hz 0:14 EOS 620T - воспроизведение 315 Гц (умножение х20) 0:31 315 hz HD sine wave (ISO standard EQ frequency) 1:00 💪 Think You're Focused? Try the #315Hz Tone for 60 Seconds and Prove It! 0:11 315 hz Binaural Demo (Left 0 hz | Right 315 hz) 1:01 315 Hz Sinus Ton Test 0dB Stereo Piepton Wave Ton 1:02 315 hz triangle