The frequency of sound is the number of sound wave cycles that occur per unit of time, typically measured in Hertz (Hz).
In simpler terms, frequency determines the pitch of a sound. A higher frequency corresponds to a higher pitch, and a lower frequency corresponds to a lower pitch. Human hearing typically ranges from about 20 Hz to 20,000 Hz (20 kHz). Sounds above 20,000 Hz are called ultrasound, and some animals, like dogs, can hear these higher frequencies.
Here's a breakdown:
- Definition: Frequency is the rate at which a sound wave repeats itself.
- Units: Hertz (Hz), which represents cycles per second.
- Human Hearing Range: Approximately 20 Hz to 20,000 Hz.
- Pitch Relationship: Higher frequency = higher pitch; lower frequency = lower pitch.
- Ultrasound: Frequencies above 20,000 Hz, inaudible to humans but audible to some animals.
- Infrasound: Frequencies below 20 Hz, generally felt rather than heard.
Therefore, the frequency of sound is a crucial characteristic that determines its pitch and audibility.
