Howtosignalprocessing
- What is magnitude in sound?
- What is amplitude of sound?
- How does amplitude and frequency affect sound?
What is magnitude in sound?
The term magnitude can apply both to the scientist's desire to measure and quantify the physical size and energy of the sound wave, and also to the listener's subjective evaluation of the loudness and/or volume of the aural experience.
What is amplitude of sound?
Amplitude is the relative strength of sound waves (transmitted vibrations), which we perceive as loudness or volume. Amplitude is measured in decibels (dB), which refer to the sound pressure level or intensity. The lower threshold of human hearing is 0 dB at 1kHz.
How does amplitude and frequency affect sound?
[BL] For sound, a higher frequency corresponds to a higher pitch while a lower frequency corresponds to a lower pitch. Amplitude corresponds to the loudness of the sound. [BL][OL] Since sound at all frequencies has the same speed in air, a change in frequency means a change in wavelength.
