Home » Audio » Measurement » How is dbv rated "A" in testing of gear
How is dbv rated "A" in testing of gear [message #97675] Tue, 07 May 2024 21:06 Go to next message
gofar99 is currently offline  gofar99
Messages: 1926
Registered: May 2010
Location: Southern Arizona
Illuminati (5th Degree)
Hi a hole in my knowledge. If you have a bode plot of an audio voltage and the results are in dbv how can the "A" rating be applied to it. Sound levels are easy to figure ...just look on a chart. But how to relative levels in measuring work. Example at 30 HZ the level (of noise as it was) is -64dbv at 200HZ it is -90dbv. and so on. So clearly the -90 is less noisy, but how much? If "A" weighting is applied what then?

Good Listening
Bruce
Re: How is dbv rated "A" in testing of gear [message #97677 is a reply to message #97675] Wed, 08 May 2024 11:42 Go to previous message
Wayne Parham is currently offline  Wayne Parham
Messages: 18726
Registered: January 2001
Illuminati (33rd Degree)

If you think about it, the various equal-loudness curves are sort of like filters. I mean, they're not a filter applied to a signal like the RIAA curve used on vinyl albums. But they are a representation of SPL/Frequency - a plot that represents how loud a frequency is perceived compared to other signals of other frequencies, given a specified amplitude.
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