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.
Violet Noise: High-pitched sounds reminding you of the hiss from a fast flowing stream or waterfall. The noise level is steady and constant, making this a great sleep aid and a good masking sound for those who suffer from ringing in the ears.