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⭐Sound definition

Form of energy

⭐Decibel definition

Measures loudness of sound intensity(?)

Audible sound waves

Between 20 and 20000Hz

Infrasonic sound waves

Less than 20Hz

Ultrasonic sound waves

More than 20000Hz

Proportionals of freq and ⭐ amp

1. Freq proportional to pitch


2. ⭐Amplitude proportional to loudness