Sine wave (975Hz): Listen & Download Sine wave (975Hz) .mp3 Error! Change your browser, please! ⇓ Download Servo motor ⚠ The noise of the elevator, knocking ⚠ Kick the bike pedals ⚠ Sine wave (975Hz) ⚠ Pogroms in a fight ⚠ Pull telescopic antenna ⚠ Sand bag ⚠ Item thrown on the bed ⚠ Tent Camping ⚠ Opening, Passenger elevator, closing doors ⚠ Room noise ⚠ Ax strike on a wooden subject ⚠ ★★★★★