![\"sampling\"](\"https:\/\/homes.esat.kuleuven.be\/~spchlab\/AudioDemonstrations\/sampling.png\")
<\/p>\n<\/p>\n
In communication, it indicates how many bits of data are transferred per hour and is generally expressed in bps (bit \/ s) of how many bits are transferred (processed) per second.<\/p>\n
![\"Sample](\"https:\/\/www.mixcorner.com\/IMG\/png\/sinusoide2.png?1620726079\")
<\/p>\n
If it is low, the size when saving as a file is small and there is space on the transmission line for communication. For example, when an audio (1 channel) is compressed to 1\/3, the 3 channel audio can be sent at the same bit rate. Excuse the old story, but considering the age of analog communication (analog cell phones), digitizing + compression will support multiple calls with the same radio waves.<\/p>\n
Finally
\nI often hear what is called Hi-Res Audio. The sampling frequency is said to be 96 kHz or 192 kHz, which is above 48 kHz, the number of quantization bits is 24 bits, and the limit (high range) of human hearing is about 20 kHz, but it expresses frequencies higher than that. It will be. It is the same bit rate as the image from a long time ago. .. ..
\nBy the way, it seems that dogs can hear up to 60 kHz and cats up to about 64 kHz.<\/p>\n
Hi-Res Example (Hi-Res Audio)
\nSampling frequency Number of quantization bits Number of channels bit rate Frequency that can be expressed
\n192 kHz twenty-four 2 9.216 kbps 96 kHz
\n192 kHz 16 16 2 6,144 kbps 96 kHz
\n96 kHz twenty-four 2 4.608 kbps 48 kHz
\n96 kHz 16 16 2 3,072 kbps 48 kHz
\n48 kHz twenty-four 2 2,304 kbps 24 kHz
\nConsidering the limit of human hearing (around 20 kHz), according to the sampling theorem, 48 kHz or 44.1 kHz is a sufficient frequency, but what about all of them? .. ..
\nIn my case, I cannot distinguish the high resolution range, but it should be able to reproduce the discarded frequency at 48 kHz to 96 kHz, and when the number of quantization bits is in the 24-bit range, the sound pressure (dB) is a bit. Feels like I’m going up (?) (It’s just my ears).
\nI’d like to make a comparison if I get a chance, but I feel like I can’t say by ear that I don’t have a proper regenerator (like an expensive analog amp).<\/p>\n
Is it finally time for cats and dogs to get verified in the acoustics industry? .. ..<\/p>\n
monipet
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Corresponding ECHONET Lite middleware from OSGi
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