Loudness — Science definition
How intense a sound seems; determined by the wave's amplitude and measured on the logarithmic decibel (dB) scale.
Where it is taught
- Sound — Waves, Sound & Optics, Physics & Environmental Science, Grade 12
In use
For small disturbances in a suitable approximately nondispersive model, it is not set by source loudness or pitch.
Sound
Questions using loudness
Problem 1
Explain the following claim and supply a valid example or counterexample: Sound requires a medium; pitch and loudness measure different aspects.
Answer and explanation
Round-trip 170 m; one-way distance 85 m. Sound requires a medium; pitch and loudness measure different aspects.
Response criteria
- State a scientifically accurate conclusion.
- Show the calculation or mechanism that supports it.
- Include units, conditions, or limits where relevant.