Exactly one complete wavelength of a 1-hertz sine wave. In audacity, you can use the repeat effect and then the change speed effect to generate any frequency. It is not meant to be a usable sound in its current form.
I created this noise from scratch to match all of your beach wave dreams! feel free to use in a film as background noise for a scene with crashing waves in the background.
Very bass harmonics for kick (to be played in parallel) and at lower volume for snare and tom bass harmonics. It was created by filtering a 60 hz sine wave (remove all the high frequencies but also the extreme low).