Ääniaalot
Ääniaalot are mechanical waves that transport sound energy through a medium by alternating regions of compression and rarefaction. They require matter to propagate and cannot travel in a vacuum. In fluids such as air and water, sound waves are primarily longitudinal. In solids, both longitudinal and transverse waves can exist, and surface waves may occur along boundaries.
Key properties include frequency (f), set by the source; wavelength (λ) and speed (v) are related by
Attenuation reduces amplitude as the wave travels, through absorption (conversion to heat), scattering, and geometric spreading.
Humans hear roughly 20 Hz to 20 kHz. Sound intensity is measured in decibels, referencing a standard
Applications and phenomena associated with Ääniaalot include acoustics and music, communication and voice transmission, sonar and