Sounds with a frequency of 20 kHz and higher are referred to as ultrasound (or ultrasonic sound). High frequency sound is sound of which the frequency lies between 8 and 20 kHz. High frequency sound with a frequency over 16 kHz can hardly be heard, but it is not completely inaudible. High frequency sound and even ultrasound in the lower frequency zone (up to 24 kHz) can be audible if the sound level is high enough. The sound threshold (the sound level where sound can be perceived) rises sharply once the frequency (and therefore, the tone) becomes higher. Younger persons hear high frequency sound better and their hearing range is greater toward the high frequencies.
Squeaky toys might sometimes sounds annoying to human ears, but dogs go...
tornado & tsunami sirensis a siren used to provide an emergency population...
Frogs are amphibians known for their jumping abilities, croaking sounds, bulging eyes,...
hawk is a relatively large bird that hunts small animals. Hawks tend...
A siren is a loud noise-making device. Civil defense sirens are mounted...
Whether you need dog sounds or dog call sounds to find your...
Created with AppPage.net
Similar Apps - visible in preview.