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Fletcher-Munson Equal Loudness Curves    1/3

Strutt|Criteria|Curves|Sound Level|Fletcher Munson ISO226 (Random Noise) inserts the equal-loudness curve for random noise into the current row of the workbook. The user may enter the phon value of the curve (i.e. the 1 kHz value) into Column D.

Entering 'MAF' into Column D returns the Minimum Audible Field (approximately 4.2 phon)

Reference: ISO226 (2003) Acoustics - Normal equal-loudness level contours

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