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Sound Quality Metrics: Loudness and Sones
https://community.sw.siemens.com/s/article/sound-quality-metrics-loudness-and-sones#:~:text=A%20curve%20of%20equal%20loudness%20represents%20all%20the,be%20expressed%20as%201%20sone%20or%2040%20phons.
Equal Loudness Curves - Georgia State University
http://hyperphysics.phy-astr.gsu.edu/hbase/Sound/eqloud.html
The perceived loudness at 1000 Hz is the reference point for defining the equal loudness curve through that point, so the numerical value of phons and dB is always the same at 1000 Hz. Finally, we could say that sound C at 65dB is the loudest of the four sounds since it shows the greatest displacement above the 60 phon curve.
Equal Loudness Curves - Power Sound Audio
https://www.powersoundaudio.com/pages/equal-loudness-curves
Under 100hz it takes much less than 10dB to be perceived as a doubling of the loudness. (remember, going from one curve to the next on these graphs represent a perceived doubling of loudness.) For example, at 20hz and 90dB it only takes about 5dB for "double the apparent loudness" Notice how insensitive our ears are in the deep bass.
Loudness Level and Frequency - University of …
http://musicweb.ucsd.edu/~trsmyth/loudness175/loudness175_4up.pdf
Music175: Loudness 2 Equal Loudness Curves •Dependency of loudness on frequency is illustrated by Fletcher and Munson’s equal loudness curves: –shows the required SPL in dB for different frequencies to sound equally loud, –each curve is the specified number of phons. Figure1: Equal-loudnesscurvesforpuretones(expressedinphons).
Acoustics Chapter One: Loudness
https://cmtext.indiana.edu/acoustics/chapter1_loudness.php
The most famous, well-used measurement for plotting our perception of loudness against the frequency of tones is the Fletcher-Munson curve (s) of equal loudness, published in 1933. The graphs were updated in 1956 by D.W. Robinson and R.S. Dadson.
Fletcher Munson Curve: The Equal Loudness Contour of …
https://ledgernote.com/columns/mixing-mastering/fletcher-munson-curve/
The Fletcher Munson Curve is the first of several measurements that came to be called equal-loudness contours. These contours are visual diagrams displaying the effect that loudness and frequency has on human hearing.
The Mysterious Loudness Control: What Does It Do? | …
https://www.extron.com/article/loudnesscontrol_ts
The shape of the minimum audibility curve tells us something about the frequency response of the ear at low sound pressure levels. At the boundary of minimum audibility, perception of low frequencies and high frequencies requires a significant …
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