What term describes a frequency of 20,000 Hz or higher?

What term describes a frequency of 20,000 Hz or higher?

• A. Infrasonic
• B. Ultrasonic
• C. Audible Sound
• D. Subsonic

Answer: (B)

Frequencies above what humans can hear fall into the ultrasonic range. The dividing line is around 20,000 Hz (20 kHz), so any frequency at or above that point is described as ultrasonic. This category is named for its place beyond the upper limit of human hearing, and it’s the term used for those higher-frequency sounds. Infrasonic describes frequencies well below human hearing (below roughly 20 Hz), which is the opposite end of the spectrum. Audible sound covers the range humans can hear (about 20 Hz to 20 kHz). Subsonic isn’t a standard term for describing sound frequency ranges; it’s more commonly associated with speeds below the speed of sound, not frequencies.

Frequencies above what humans can hear fall into the ultrasonic range. The dividing line is around 20,000 Hz (20 kHz), so any frequency at or above that point is described as ultrasonic. This category is named for its place beyond the upper limit of human hearing, and it’s the term used for those higher-frequency sounds.

Infrasonic describes frequencies well below human hearing (below roughly 20 Hz), which is the opposite end of the spectrum. Audible sound covers the range humans can hear (about 20 Hz to 20 kHz). Subsonic isn’t a standard term for describing sound frequency ranges; it’s more commonly associated with speeds below the speed of sound, not frequencies.