The 65 Hz frequency is categorized under Test Tones. It is known for: A solid bass frequency for general audio system checks. Also: C2, a deep, rumbling C note, often found in sub-bass ranges..

Our free online tone generator allows you to play this 65 Hz frequency instantly. Use the controls above to adjust the volume or switch waveforms (sine, square, sawtooth, triangle) to hear the different timbres.