(adj.) (1) Sounds that the human ear cannot hear. (2) Of or relating to acoustic frequencies above the range that the human ear can hear, or above approximately 20,000 hertz.
(1) Sounds above 20,000 hertz. (2) Supersonic.
sound waves that have frequencies higher than what humans can hear, usually greater than 20,000 Hz. Some animals such as bats, a species of cave bird, and cetaceans use these high frequency ultrasonic sounds for communication and navigation A bivalve shell: 1 = umbo; 2 = periostracum (the pigmented outermost layer of the shell). (Photo: Rick Gillis, Ph.D., Biology Dept., University of Wisconsin-La Crosse)
Having frequencies above the range of human hearing, commonly considered to be 20 kHz. Not to be confused with "supersonic", which means faster than the speed of sound. Ultrasonic frequencies in the signal path can sometimes cause harmonic distortion in audio components that are in the human hearing range and quite audible.
Utilizing, produced by or relating to ultrasonic waves or vibrations. For the purposes of this document, ultrasonic waves are acoustic waves having a frequency above 18 kHz. The limit value of 18 kHz was chosen as a compromise between the two values most commonly found in the literature, 16 and 20 kHz.
Beyond the upper-frequency limit of human hearing. Compare "supersonic."
A term referring to acoustic vibration frequencies greater than about 20,000 hertz.
Signals of high frequency range which is beyond human hearing. It is approximately 20 kHz.
Sound frequencies above audible sound. Ultrasonic water and snow level sensors are available that do not make contact with the media of measurement. They send out a signal, track the amount of time it takes for the reflected signal to return then use the elapsed time to calculate the distance the signal traveled. Air temperature is also measured since the calculation needs to compensate for temperature-related fluctuations in the speed of sound.
Referring to sound waves with frequencies higher than those at the upper limit of unimpaired human hearing, usually between 16 and 20 KHz.
having to do with frequencies of sound above normal human hearing, generally accepted to be at 20KHz to 2MHZ and above, but also extended down to the 5KHz to 20KHz range in certain processing applications (cf subsonic, supersonic, or transsonic, which have to do with the speed of sound).
having frequencies above those of audible sound
Sound waves that are too high for humans to hear are "ultrasonic". The hearing range of many animals, including rodents, extends much higher than for humans.
Term used to describe a vibrating wave of a frequency above that of the upper frequency limit of the human ear; it generally embraces all frequencies above 16 kilocycles/second.
A frequency above the limits of the human ear - above 20k Hz.
Process that utilizes specially-designed tooling usually vibrating at 15-80 KHz?. Processes are designed to cause localized heating of thermoplastic materials which, in turn, will provide some type of welded or fused joint. Benefits are elimination of fillers and minimized heat stress on surrounding materials.
frequency above the normal hearing range, generally accepted to be above 17 kilohertz, and typically 20 kHz or higher.
A sound frequency that's too high for humans to hear.
relating to energy waves similar to those of audible sound but of higher frequency (above 30,000 Hz)
Conversion of high frequency electrical current into mechanical vibrations.
Refers to the frequency of operation of an electric or acoustic device - a general term for "higher than 20 kiloherz".
Vibrations above the range of normal human hearing (50kHz or higher).
Sound vibration above the audible range.
a frequency above the human ear's audibility limit of about 20,000 hertz.
Beyond the upper range of human hearing.
Sounds with frequencies above 20,000 Hz and, therefore, beyond the range of human hearing.
Using frequencies above 20,000 hertz in cleaning technology or wave solder flux dispensing.
In industry, a device which uses sound waves to detect or quantify a process variable.
Sound energy at frequencies just above the range of human hearing, starting at about 20 kHz. Banner ultrasonic sensors function at between 75 to 400 kHz, depending on model. The use of ultrasound is of advantage in many sensing applications because of its ability to detect objects without regard to their reflectivity or translucency to light.
Of or relating to acoustic frequencies above the range audible to the human ear, or above approximately 20,000 hertz. Compare with supersonic.