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What is Sending Loudness Rating mean?
The sending loudness rating (SLR) is a measure of the loudness of the transmit audio sent through the microphone of a communication device (for example, a mobile phone) It compares the Sound intensity of the sound waves into the microphone to the resulting audio signal. It is measured in dBV/Pa.
For telephony, the reference sound pressure level is 20 micro-Pascals, with values in dB referenced to that value.
20 micro-Pascals is called the Threshold of human hearing, and is equal to 0 dB Sound pressure level (SPL).
ITU-T recommendation P.79 has the frequency weighted sensitivity calculations in it for sending loudness rating (SLR) and receive loudness rating (RLR) for telephony.
referencePosted on 14 Dec 2024, this text provides information on Miscellaneous in Technology related to Technology. Please note that while accuracy is prioritized, the data presented might not be entirely correct or up-to-date. This information is offered for general knowledge and informational purposes only, and should not be considered as a substitute for professional advice.
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