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Memory Card
The header file contains measurement parameters and other information.
The data file contains the sound pressure level, over-range information ("O"),
under-range information ("U"), and pause information ("P") in CSV format.
Line returns are <CR><LF>.
One file contains up to 60,000 data. When this number is exceeded, a new file
is created. Up to 120 files (corresponding to 200 hours with 100 ms sampling)
can be created.