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Python: How to generate log-frequency spectrogram from an ...
https://dsp.stackexchange.com/questions/73414/python-how-to-generate-log-frequency-spectrogram-from-an-audio#:~:text=A%20logarithmic%20frequency%20axis%20also%20accounts%20for%20the,scale%2C%20for%20example%2C%20by%20using%20a%20decibel%20scale.
Logarithmic scales of frequency and amplitude
http://www.phon.ox.ac.uk/jcoleman/LOGARITH.htm
Logarithmic Frequency Scaling - Symphony Industrial AI
http://azimadli.com/vibman/logarithmicfrequencyscaling.htm
The frequency of a sound determines its pitch as perceived by a listener, and a frequency ratio of two is a perceived pitch change of one octave, no matter what the actual frequencies are. For instance if a sound of 100 Hz frequency is raised to 200 Hz , its pitch will rise one octave , and a sound of 1000 Hz , when raised to 2000 Hz , will also rise one octave in pitch.
Logarithmic Scales in Acoustic Spectra: Decibels and ...
https://demonstrations.wolfram.com/LogarithmicScalesInAcousticSpectraDecibelsAndOctaves/
In acoustics, huge changes in measurable physical parameters (pressure, power, frequency) correspond to relatively small changes in perceived properties (loudness, pitch). Simply using a linear scale is impractical, since the variation gives an inadequate guide to the perceived sound. Instead it is more practical to convert to logarithmic scales. Octaves are the logarithmic units …
Learning from Audio: The Mel Scale, Mel Spectrograms, …
https://towardsdatascience.com/learning-from-audio-the-mel-scale-mel-spectrograms-and-mel-frequency-cepstral-coefficients-f5752b6324a8
The Mel Scale is a logarithmic transformation of a signal’s frequency. The core idea of this transformation is that sounds of equal distance on the Mel Scale are perceived to be of equal distance to humans. What does this mean? For example, most human beings can easily tell the difference between a 100 Hz and 200 Hz sound.
The non-linearities of the Human Ear - Audio Check
https://www.audiocheck.net/soundtests_nonlinear.php
With the linear scale sound level test, levels increase linearly as follows: 5% 10% 15% 20% 25% of the maximum dynamic range allowed by the sound file (0 dBFS). With the logarithmic test, levels are doubling from one step to the next (+6dB): 5% 10% 20% 40% 80%. Which one sounds the most evenly spaced to you? The logarithmic scale again.
Characteristics of Sound and the Decibel Scale
https://www.epd.gov.hk/epd/noise_education/web/ENG_EPD_HTML/m1/intro_5.html
The scale uses the hearing threshold of 20 μPa or 20 x 10-6 Pa as the reference level. This is defined as 0 dB. Sound pressure level, which is often abbreviated as SPL or L p, in decibels (dB), can then be obtained using the following formula. You can …
Logarithmic Frequency response graphs - High-End Audio ...
https://forum.audiogon.com/discussions/logarithmic-frequency-response-graphs
Human hearing and human music is not linear, but logarithmic in nature. Think about it. As an example, there are eight notes and twenty integer frequencies in the 20Hz to 40Hz octave. There are still only eight notes, but 10,000 integer frequencies in the octave from 10,000Hz to 20,000Hz.
Why is a logarithmic scale used to measure sound? - Quora
https://www.quora.com/Why-is-a-logarithmic-scale-used-to-measure-sound
A logarithmic scale is standard for measuring the perceived loudness of sound. The perceived loudness of sound is basically proportional to the logarithm of the …
Logarithmic Scale - an overview | ScienceDirect Topics
https://www.sciencedirect.com/topics/engineering/logarithmic-scale
The horizontal axis is frequency in logarithmic scale. That is, the distance between a frequency and its ten times more or less, e.g., 1 and 10 or 0.1, is divided in length proportional to: log 1 = 0, log 2 = 0.3010, log 4 = 0.6020, log 8 = 0.9030, log 10 = …
log vs linear spectrum? - KVR Audio
https://www.kvraudio.com/forum/viewtopic.php?t=48761
A logarithmic scale means that each octave occupies the same 'width' across the spectrum. This makes it easier to judge certain things. On a linear scale, though the frequencies are even distances apart, if you were to plot the octave band limits, you would see them getting further apart as you go along the axis.
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