Quick question - headphone click sound

When I use my Bose QC15 headphones with my phone, if I launch an app or press one of the nav keys, I hear a clicking sound through the headphones, like it is turning off and on almost.. I know that sounds odd, but I was wondering if anyone else has this issue and has a possible solution?
Also, when audio is playing this noise stops. It is only when there is no audio playing.
Thanks.

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[Review] Mpow® Cobble Bluetooth 4.0 Headset Wireless Headphone

This Bluetooth Headset is awesome!

Paired devices:
iPhone 4, HTC One m8, MacBook Air, Nvidia Shield Portable

Usage: I use use this headset day-to-day to listen to music on my HTC One m8 and it's awesome! I am able to listen to music and hear external noises without any issues. On an average day, on the medium setting, I can get about 5 hours of the estimated battery life. The great thing about this headset is that it charges fully within several minutes.

Conclusion:
This headset is a great solution for those whom drive and use their cellphones at the same time. The buttons are easy to feel for and use.

Pros:
Great battery life
Easy to locate, tactile buttons
Very good Bluetooth range
Very loud
Very easy to operate
Pairs with 2 devices
With the included ear hooks, these headsets will never fall out (even during strenuous exercises)
Audio prompts for battery status
Charges very quickly
Light-weight
Ambidextrous (works easily on left / right ear)
Discrete design (the indicator LED is faced towards the user's face)

Cons:
None

Item contents:
Mpow Cobble Bluetooth 4.0 Headset
Micro USB cable
Instructional pamphlet/ warranty documentation

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