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Phon

Khon Kaen, Thailand
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BAN PHAI    30 BUA YAI    32 KAENG KHRO    49 CHAIYAPHUM    61 PHIMAI    67 KOSUM PHISAI    69 KHAM SAKAE SAENG    70 PHAYAKKHAPHUM PHISAI    72 KHON KAEN    74 NON SUNG    79 PHU KHIAO    80 WAPI PATHUM    83 MAHA SARAKHAM    85 KASET SOMBUN    86 NON THAI    89 BAN HUAI THALAENG    92 SATUEK    94 CHUM PHAE    97 BAMNET NARONG    104 YANG TALAT    105

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Phon,  Khon Kaen, Thailand

Phon - unit of loudness level for pure tones

Population: 14596 inh.
Region: Khon Kaen
Country: Thailand
Continent: AS

"The phon is a unit of loudness for pure tones. Human sensitivity to sound is variable across different frequencies; therefore, although two different tones may have identical sound intensity, they may be psychoacoustically perceived as differing in loudness. The purpose of the phon is to provide a standard measurement for perceived intensity. The phon is psychophysically matched to a reference frequency of 1 kHz. In other words, the phon matches the sound pressure level (SPL) in decibels of a similarly perceived 1 kHz pure tone. For instance, if a sound is perceived to be equal in intensity to a 1 kHz tone with an SPL of 50 dB, then it has a loudness of 50 phons, regardless of its physical properties. The phon was proposed in DIN 45631 and ISO 532 B by S. S. Stevens. - Wikipedia"

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