Audio Test ~ Sine Sweep 'falling down' from 20000 to 20 Hz (Max/Msp) v1

If you are going to use headphones, be very careful about adjusting the volume.
Hearing range describes the range of frequencies that can be heard by humans or other animals. The human range is commonly given as 20 to 20,000 Hz, though there is considerable variation between individuals, especially at high frequencies, and a gradual loss of sensitivity to higher frequencies with age is considered normal.

Because of YouTube compression of the video/audio file, the audio frequencies may be slightly altered, especially at the extremities of the band (I'm sorry). Make sure to set the best audio-video quality available. Thank you.