Reduce TX Power / Signal Strength

Hi,
I appreciate this may be an odd request but i am looking for a way to reduce the signal strength of the WiFi adapter. I have read this post and a couple similar - https://forums.kali.org/showthread.p...ignal-Strength

And it seems it's straight forward to increase it so if i use the same commands but reduce power to 10 would that in theory half the signal strength ( presuming 20 is the default ). I am using the USB WiFi device - TP-Link TL-WN722N connected to a RPI 2b.

Thanks

ifconfig wlan0 down
iwconfig wlan0 txpower 10
ifconfig wlan0 up

]A 3 dB decrease will be half the power.

so 17 dB is half the power of 20 dB

Code:

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iwconfig wlan0 txpower 17

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wavemon will tell u the power in milliwats

Hey everyone,

I came across this thread as I was looking for the "typical" increase in power.

Currently nothing I configure via iwconfig works on my virtualBox machine.
Anyone experienced something similar to this?

root@kali:~# uname -a
Linux kali 4.7.0-kali1-amd64 #1 SMP Debian 4.7.6-1kali1 (2016-10-17) x86_64 GNU/Linux
root@kali:~# iwconfig wlan0mon txpower 17
root@kali:~# iwconfig
wlan0mon IEEE 802.11 Mode:Monitor Frequency:2.422 GHz Tx-Power=20 dBm
Retry short limit:7 RTS thr:off Fragment thr:off
Power Management:off


Thanks, any help is appreciated