Help Topics - U |
 |
|||||||||||||
| Click on the letter below to select the Help Topic page you want to view | ||||||||||||||
| A | B | C | D | E | F | G | H | I | J | K | L | M | ||
| N | O | P | Q | R | S | T | U | V | W | X | Y | Z | ||
Ultrasonic soundSound waves with frequencies higher than 20 kHz beyond the audible range for a normal human being. Dog whistles operate at frequencies around the 30 kHz region. Bats are thought to be able to "hear" ultrasonic sounds up to about 100 kHz.
|
||||||||||||||
 previous Help Topic letter |
 print this Help Topic page |
 Close Help Window |
 call for more help (800) 366-2966 |
 next Help Topic letter |
||||||||||
