[units] EE Acceleration, Velocity, Displacement in terms of decibels
Boost Units, Has anyone done any work, conversions, etc, with Acceleration, Velocity, Displacement (Length) in terms of decibels? dB, dBA, dBV, etc, and conversions to/from more "conventional" units like meters, meters per second, meters per second per second? I am learning, for example, that it is possibly to integrate across the Time dimension in order to yield Velocity from Acceleration, or similarly, Displacement (Length) from Velocity. I am doing a job with these type conversions going on across a spectrum analysis and would be interested in hooking up the calculations using boost::units to help enforce dimensional / unit integrity. Thanks... Best regards, Michael
Has anyone done any work, conversions, etc, with Acceleration, Velocity, Displacement (Length) in terms of decibels? dB, dBA, dBV, etc, and conversions to/from more "conventional" units like meters, meters per second, meters per second per second?
I am learning, for example, that it is possibly to integrate across the Time dimension in order to yield Velocity from Acceleration, or similarly, Displacement (Length) from Velocity.
I am doing a job with these type conversions going on across a spectrum analysis and would be interested in hooking up the calculations using boost::units to help enforce dimensional / unit integrity.
Decibels and all their variants are defined as logs of ratios and, therefore, must be dimensionless. What would be sensible is to define various helper functions that take a quantity and return a log ratio. Matthias
On Sun, Dec 4, 2011 at 11:35 AM, Matthias Schabel <boost@schabel-family.org>wrote:
Has anyone done any work, conversions, etc, with Acceleration, Velocity, Displacement (Length) in terms of decibels? dB, dBA, dBV, etc, and conversions to/from more "conventional" units like meters, meters per second, meters per second per second?
I am learning, for example, that it is possibly to integrate across the Time dimension in order to yield Velocity from Acceleration, or similarly, Displacement (Length) from Velocity.
I am doing a job with these type conversions going on across a spectrum analysis and would be interested in hooking up the calculations using boost::units to help enforce dimensional / unit integrity.
Decibels and all their variants are defined as logs of ratios and, therefore, must be dimensionless. What would be sensible is to define various helper functions that take a quantity and return a log ratio.
Yessir, that jives with the legacy C/C++ code I am seeing. A lot of log10(...) and pow(10,...) converting to and from Db and from Acceleration to Velocity to Displacement and back. Are there any examples how to construct such a ratio-based conversion? Many of them incorporate the frequency (or Time in hertz, I'm assuming) domain to pick up the dimensional conversion as well. Thanks... Matthias
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participants (2)
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Matthias Schabel -
Michael Powell