SimCom SIM7500 Series

Smart Machine Smart Decision
SIM7500_SIM7600 Series_AT Command Manual_V1.07 2017-12-25
145
6.35 AT+CNSN MIC NOISE suppression
Description
This command is used to adjust oversubtraction factor and bias compensation for noise estimation.
It modify the DENS_gamma_n of TX_VOICE_SMECNS in DSP. The bigger the value, the
stronger the noise suppression .This command only be used during call and don’
t save the
parameter after call.
SIM PIN References
NO Vendor
Syntax
Test Command Responses
AT+ CNSN=? +CNSN: (list of supported <value>s)
OK
Read Command Responses
AT+ CNSN? +CNSN: <value>
OK
Write Command Responses
AT+ CNSN=<value> OK
ERROR
Defined values
<value>
Gain value from 0x0000-0x7fff, default value is not a fixed value. It varies with different versions.
Examples
AT+CNSN=0x1234
OK
AT+CNSN?
+CNSN: 0x0258
OK
6.36 AT+CNSLIM MIC NOISE suppression
Description
This command is used to controls the maximum amount of noise suppression. I
t modify the
DENS_limit_NS of TX_VOICE_SMECNS in DSP. The bigger the value, the stronger the noise
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