Young humans can generally hear sounds with frequencies between 20 Hz and 20,000 Hz (the audio range or hearing range) although this range varies significantly with age, occupational hearing damage, and gender. The majority of people can no longer hear 20,000 Hz by the time they are teenagers, and progressively lose the ability to hear higher frequencies with age.
The short version, A tone outside the audible range of hearing for most people over the age of 30. This means that you can get phone calls and receive text messages in class or school without teachers hearing it.
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Who can hear your ringtone?
Young humans can hear between 20 Hz to 20,000 Hz
Dogs can hear between 40 Hz to 60,000 Hz
Bats can hear between 20 Hz to 120,000 Hz
Bats can hear between 1000 Hz to 90,000 Hz