Sine wave (975Hz): Listen & Download Sine wave (975Hz) .mp3 Error! Change your browser, please! ⇓ Download Tambourine ⚠ The noise of the room, air conditioning, ⚠ Beep time ⚠ Battery Hits ⚠ Squatting the Mat (0.5 seconds) ⚠ Open, close the castle, Diplomat, briefcase ⚠ Board falls ⚠ Tinder duster surface ⚠ Ice crushing ⚠ Blow into the microphone ⚠ Throw nutshells on the floor ⚠ The robot makes sounds ⚠ ★★★★★