The feedback fairy is one of the rarer breeds I have managed to capture. I currently have only one in my collection and he is very much staying there for now.
Much like the Penny Pincher, it is actually one of the less objectionable kinds to encounter. Unless of course you happy to be a compare or musician of course.
The all consuming desire of these noisy little creatures is to sing and be heard by as many people as possible. To this end they are attracted to microphones and guitar pickups live the proverbial moth to the flame.
Their song can actually be quite pleasant. However, it’s often amplified to painful levels and contains complex harmonics that can create further feedback loops in a badly positioned microphone.
Outside of capturing the little blighters (my patented trapping circle works just fine) the trick is to make sure that unattended microphones have the gain turned right down. If a microphone in use attracts one, a quick twist or shake of the microphone will often throw the fairy to the ground and send them off in a huff.
Although they are most often complained about when they stumble across live music performances, the Feedback Fairy is actually much more commonly found in places that make very regular use of public announcement systems. Most malls and supermarkets will host a small family while a train station may house up to a dozen of the little blighters.
The Feedback Fairy is substantially larger than the majority of breeds. In a biological creature this would have evolved to contain the larger lungs required for the loud screeches and whines they can create. Of course being a techno-thaumaturgical creature this instead allows a greater bioelectric charge to be generated by the double coiled outer winding structure.
All of this energy is then of course channelled in bursts to the speaker system mounted in the head of the fairy.