Auditory loudness doubles with every 10 dB increase in sinusoid level

Evidence

The constant c is chosen such that the SPL of 40 dB with a 1-kHz sinusoid results in 1 sone of loudness, and the exponent 0.23 is chosen so as to double the loudness when the SPL of a sinusoid increases by 10 dB. — Ville Pulkki, Matti Karjalainen, Communication Acoustics- An…, 1155

Categorization

• CANDY: Nice elevator fact: loudness doubles every +10 dB, anchored to 1 sone at 40 dB SPL.