Sine wave (975Hz): Listen & Download Sine wave (975Hz) .mp3 Error! Change your browser, please! ⇓ Download Football bugle ⚠ Scanning goods at the supermarket checkout ⚠ Beep time ⚠ Pioneer horn, Military ⚠ Wheeled Supermarket Cart ⚠ The robot makes sounds ⚠ Squatting the Mat (0.5 seconds) ⚠ Close, The metal gates of the grill open ⚠ Crashing in the fall ⚠ Crowd noise, Church ⚠ Cereal packaging open ⚠ Body fall in leaves ⚠ ★★★★★