| Revision as of 16:34, 14 August 2005 edit80.203.101.150 (talk)No edit summary← Previous edit | Revision as of 08:40, 15 October 2005 edit undoRoo72 (talk | contribs)2,460 editsm pl:SonNext edit → | ||
| Line 12: | Line 12: | ||
| ] | ] | ||
| ] | ] | ||
| ] | |||
Revision as of 08:40, 15 October 2005
The sone is a unit of perceived loudness after a proposal of S. Smith Stevens in 1936. In acoustics, loudness is a subjective measure of the sound pressure. One sone is equivalent to 40 phons, which is defined as the loudness of a 1 kHz tone at 40 dB SPL. The number of sones to a phon was chosen so that a doubling of the number of sones sounds to the human ear like a doubling of the loudness, which also corresponds to increasing the sound pressure level by 10 dB, or increasing the sound pressure by a factor 3.16 (=). At frequencies other than 1 kHz, the measurement in sones must be calibrated according to the frequency response of human hearing, which is of course a subjective process. The study of apparent loudness is included in the topic of psychoacoustics.
). At frequencies other than 1 kHz, the measurement in sones must be calibrated according to the frequency response of human To be fully precise, a measurement in sones must be qualified by the optional suffix G, which means that the loudness value is calculated from frequency groups, and by one of the two suffixes F (for free field) or D (for diffuse field).