Äänitaajuudet

Äänitaajuudet, also known as audio frequencies, refer to the range of frequencies that the human ear can perceive as sound. This range is typically considered to be from 20 Hertz (Hz) to 20,000 Hertz (20 kHz). Hertz is a unit of frequency, representing cycles per second.

Frequencies below the audible range are called infrasound, while those above are called ultrasound. Different animals have varying audible ranges. For example, dogs can hear higher frequencies than humans, while elephants can perceive lower frequencies.

Within the audible range, different frequencies are perceived as different pitches. Lower frequencies correspond to lower pitches (bass sounds), and higher frequencies correspond to higher pitches (treble sounds). Musical instruments and human voices produce a complex mix of frequencies, which gives them their unique timbres.

The study of sound frequencies is crucial in various fields, including acoustics, music, audiology, and engineering. In music, understanding frequencies is fundamental to composition and instrument design. In audiology, audiograms measure an individual's hearing sensitivity across different frequencies to diagnose hearing loss. In engineering, audio frequencies are manipulated and processed for applications like audio recording, playback, and noise reduction. The way sound waves interact with the environment and are perceived by the ear is directly related to their frequencies.