Embrace flawless clarity. Making sure your guitar sounds defined and clear is essential especially in live performance. The martin feedback buster acoustic soundhole cover is the accessory you need to give your electro acoustic guitar its purest sound ever.say goodbye to noise interference. A common problem that electro acoustic guitarists often find themselves encountering is horrible noisy feedback when plugged into an amp at high outputs. This is especially disastrous during live performance. Make sure this never happens. Youll always enjoy beautiful clarity thanks to a rubber construction that eliminates noise. Everything you play will sound untainted and just as it should. With the martin feedback buster youll never have to compromise your live sound again.