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The Fundamentals of Amplitude and Loudness — Pro Audio Files
https://theproaudiofiles.com/amplitude-and-loudness/#:~:text=%E2%80%9CThe%20A-weighting%20curve%20is%20one%20of%20a%20set,for%20measuring%20very%20loud%20aircraft%20noise.%E2%80%9D%20%28%20source%29
Frequency-Weightings for Sound Level Measurements - …
https://www.nti-audio.com/en/support/know-how/frequency-weightings-for-sound-level-measurements
A, B and C weighting reference curves – Listen Inc
https://support.listeninc.com/hc/en-us/articles/204508154-A-B-and-C-weighting-reference-curves
A, B and C weighting reference curves – Listen Inc Listen Inc Sequences & Resources Reference Curves Follow A, B and C weighting reference curves These curves are in .dat format for use in …
Frequency weightings: A, B, C and Z - Doctor Pro Audio . com
https://www.doctorproaudio.com/content.php?2279-frequency-weightings-abc&langid=1
To try and approximate acoustical analyzers to the response of the ear, frequency weighting curves were created. These are simplified versions of the ears' frequency response at different levels. Thus, for low sound pressure levels, the A weighting is used, which provides substantial low frequency attenuation (-50 dB at 20 Hz and almost -20 dB ...
A-, B-, C- and D-weighting curves - Wiley
https://onlinelibrary.wiley.com/doi/pdf/10.1002/9780470869253.app4
A-, B-, C- and D- weighting curves according to [178, 179]. Note that for each relative frequency response point there is an associated measurement tolerance, which can be found from the associated recommendation. Reproduced by permission of International Electrotechnical Commission (IEC).60
Curves vs RTA weighting | DiyMobileAudio.com Car Stereo Forum
https://www.diymobileaudio.com/threads/curves-vs-rta-weighting.208409/
Weighting curves have then been developed so that broadband level values correlate more closely to the human hearing. A weighted display of the input spectrum accounts for this effect as it shows the levels as they would be perceived according to the A, B or C weighting standards (ANSI S1.4 (A, B, C) or IEC 61672-1 (A, C, Z)).
The Mysterious Loudness Control: What Does It Do? | …
https://www.extron.com/article/loudnesscontrol_ts
The D-weighting Curve is a special case developed for aircraft fly-over noise testing, which penalizes high frequencies.3 Likewise, sound level measurements in decibels relative to these weighting curves are recorded as dB (B), dB (C), and dB (D), respectively.
Relationship between Fletcher-Muson curves and Sound …
https://www.superbestaudiofriends.org/index.php?threads/relationship-between-fletcher-muson-curves-and-sound-level-measurements.10340/
Specifically weighting curves and their relationship with Equal Loudness Contours. Here are the A, B and C weighting curve specifications for ANSI and ISO compliant Sound Level Meters (SLM.) The graph above shows SLM A and C weighting curves. Note the A weighted curve is actually above the C weighted curve above 1000 Hz.
A-Weighting Filter For Audio Measurements
https://sound-au.com/project17.htm
At a rough guess I would suggest the A-weighting curve may have some small relevance somewhere around 40dB SPL (unweighted!) and below. However ... Any noise measured using A-weighting must be free from tonality or rhythm, and will be a broad bandwidth random signal.
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