At+Cnsn Mic Noise Suppression; At+Cnslim Mic Noise Suppression - SimCom SIM7500 Series At Command Manual

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
AT+CNSN=?
Read Command
AT+CNSN?
Write Command
AT+CNSN=<value>
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. It modify the
DENS_limit_NS of TX_VOICE_SMECNS in DSP. The bigger the value, the stronger the noise
SIM7500_SIM7600 Series_AT Command Manual_V1.07
Responses
+CNSN: (list of supported <value>s)
OK
Responses
+CNSN: <value>
OK
Responses
OK
ERROR
Smart Machine Smart Decision
145 2017-12-25