What unit is used to measure the subjective human perception of loudness, which differs from the objective $ ext{dB}$ reading?

Answer

Phons

While $ ext{dB}$ measures the Sound Intensity Level ($ ext{SIL}$), the human perception of loudness is measured in phons, which align closely with $ ext{dB}$ only near $1000 ext{ Hz}$.

What unit is used to measure the subjective human perception of loudness, which differs from the objective $	ext{dB}$ reading?

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