Sone

The sone is a unit of how loud a sound is perceived. The sone scale is linear. Doubling the perceived loudness doubles the sone value. Proposed by Stanley Smith Stevens in 1936, it is a non-SI unit.

In acoustics, loudness is the subjective perception of sound pressure. The study of apparent loudness is included in the topic of psychoacoustics and employs methods of psychophysics.

Examples of sound pressure, sound pressure levels and loudness in sone

Formulae

According to Stevens' definition, a loudness of 1 sone is equivalent to the loudness of a signal at 40 phons, the loudness level of a 1 kHz tone at 40 dB SPL. But phons scale with level in dB, not with loudness, so the sone and phon scales are not proportional. Rather, the loudness in sones is, at least very nearly, a power law function of the signal intensity, with an exponent of 0.3. With this exponent, each 10 phon increase (or 10 dB at 1 kHz) produces almost exactly a doubling of the loudness in sones.

At frequencies other than 1 kHz, the loudness level in phons is calibrated according to the frequency response of human hearing, via a set of equal-loudness contours, and then the loudness level in phons is mapped to loudness in sones via the same power law.

Luis Pérez Meza

Ignacio Pérez Meza, better known as Luis Pérez Meza (22 May 1917 – 9 June 1981) was a Mexican singer and songwriter of banda and ranchera music who also appeared in several films of the Golden Age of Mexican cinema.

Pérez Meza's holiday home in Mazatlán, Sinaloa served briefly as museum and cultural center.

Filmography

External links

References

Luis Pérez

Luis Pérez may refer to:

Cosalá

Cosalá (Spanish  [kosala'] is a small city and the seat of its surrounding municipality in the Mexican state of Sinaloa. It stands at 24°24′45″N 106°41′30″W / 24.41250°N 106.69167°W / 24.41250; -106.69167. The city reported 6,577 inhabitants in the 2010 census.

Overview

Cosala is located 155 km. from state capital Culiacán. The Royal of the Eleven Thousand Virgins, shortened its name to the Royal Mines of Cosala is the municipal seat and without doubt one of the most beautiful villages of the state, keeping a quiet atmosphere that seem like you are in a story book. As if history had stopped in the times of the Spaniards. Every little street is a delight. One would want to stay at least a couple of days in Cosala.

Francisco Iriarte y Conde, governor of Occidente State declared Cosala the capital of the western state in 1826. This was due to the growing threat of attack on the former capital El Fuerte, Sinaloa by the forces of Juan Banderas, leader of the Yaqui at that point in the Yaqui Wars.