The amount of static depends on the resolution

The amount of static depends on the resolution of the analog-to-digital converters along with the quality of other components.
Most of modern cordless speakers use power blocker which are digital, also called "class-d blocker". Class-D amps employ a switching stage that oscillates at a frequency in the range of 300 kHz to 1 MHz. This switching noise may cause a certain level of loudspeaker distortion but is frequently not included in the signal-to-noise ratio which merely considers noise between 20 Hz and 20 kHz.I am going to offer some guidance to help you choose a pair of wireless speakers from the large number of available models.
Wireless speakers are a great choice for adding speakers in additional rooms of your house without adding wiring. In addition, these speakers are ideal for adding surround sound to your TV without running lots of speaker cable around the room.Whatever the reason, it's easy to do.If you want to block your number on a call-by-call basis you need to dial *67 before dialing the number.When you do this you will not have any feedback that it worked. If you want to test it, just call your home phone, or anther phone that has a caller ID from your cell to confirm that the block worked.One important thing to remember is that your number will not be blocked from emergency services or any toll-free number - it only works when you call businesses and individuals.
Another strategy you can use is caller ID spoofing, which displays a different name and number than the one you're calling from. The cell phone then gains more signal and improves the quality and reception of the calls that are made. This device is best used in crowded places, such as football games, basketball games and athletic events.
    Features.  Different types of blocker are available on the market; some will be more effective than others.  The device increases the signal range of the cell phone.
The RSSI is vendor dependant - in other words, the network being connected to can fluctuate, it can improve of deteriorate. BTS output power levels can be changed or an antenna can be turned a little into another direction, the network could erect another BTS or cellphone tower in the vicinity.