Today's subject how to pass trought an explosive without beeing power cut by their jammer! there's two aspects about it, or two ways to face the problem, first one, determine in which frequency is any electric circuit even not connected to a power source transmitting, so we can determine if it can work on other non detected frequency, what is an undetected frequency, not a lower one, or the detonator won't work of course, or else, how to confuse the jammer.

So, we don't want, for begging of conversation a constant frequency, on the electric circuit, and we want that the frequency cellphone they detect have a confusing electronic "agent"...let me post the theory about what I'm saying:

 Many modern microcomputers use a "clock multiplier" which multiplies a lower frequency external clock to the appropriate clock rate of the microprocessor. This allows the CPU to operate at a much higher frequency than the rest of the computer....Some sensitive mixed-signal circuits, such as precision analog-to-digital converters, use sine waves rather than square waves as their clock signals, because square waves contain high-frequency harmonics that can interfere with the analog circuitry and cause noise
 ...Such digital devices work just as well with a clock generator that dynamically changes its frequency, such as spread-spectrum clock generation, dynamic frequency scaling, PowerNow!, Cool'n'Quiet, SpeedStep, etc (wikipedia)

ANOTHER QUESTION THEREFORE IS:

How can a CPU dynamically change its clock frequency?

http://electronics.stackexchange.com/questions/62353/how-can-a-cpu-dynamically-change-its-clock-frequency 

BUT MUCH MORE IMPORTANT IS TO CONCLUDE THAT THIS MY BE THE TRICKY:

How can I connect multiple bluetooth devices to a single bluetooth device?

 

It is possible within the Bluetooth specification to have a Bluetooth master device connected to multiple slave devices, but there are limits:

     > Prior to Bluetooth spec. rev. 4.1, Slave devices could only be connected to a single piconet at a time. The reason for this is because when the connection is initiated, the advertising device must synchronize it's clock to that of the initiator. So, a slave device cannot be synchronized to two independent free-running clocks at the same time, hence the one master per slave limit. Bluetooth 4.1 addresses this, so a slave device can be connected to two piconets simultaneously, however I don't know the exact details of how.

     > The Bluetooth device you're using must be running a stack that  supports multiple concurrent connections. Many Bluetooth stacks do support this, but there is a limit on how many devices can be connected at the same time, and the limit is usually related to the amount of memory available on the Master device.

     > The type of connection you're using must allow for multiple instances of that connection on a piconet. This is easiest to explain by example. You can only have a single Bluetooth audio connection for music streaming. The reason for this is that the A2DP profile for audio streaming is designed to have only a single connection active at a time. So you cannot connect your smartphone to two Bluetooth speakers at the same time. 

Given all that, you also need an interface to the Bluetooth device that allows you to setup multiple connections. So while this may all be theoretically possible, if the devices interface/software was not designed to allow for  two connections at a time, you're out of luck. 

https://www.quora.com/How-can-I-connect-multiple-bluetooth-devices-to-a-single-bluetooth-device