Cicada Chorus 1 Nature Sounds. Cicada Chorus 1: A chorus of high-pitched cicadas rising and falling in the foreground. The sounds can be shrill so keep the playback volume low and adjust carefully. This same shrillness or emphasis on high frequencies also makes this recording excellent masking effects for locations with fans, machinery, or ringing in the ears.
Waterfall: The rush of water is constant and steady. The noise contains mid and high range tones which are amazingly relaxing. This recording is a good sleep aid and is well-suited for those with ringing in the ears.