Sound hole covers, often referred to as soundhole covers or soundhole plugs, are unassuming accessories that play a significant role in the world of acoustic guitars. These small circular or oval-shaped devices are inserted into the soundhole of an acoustic guitar. While they may seem inconspicuous, sound hole covers serve several essential purposes that enhance the versatility and functionality of the instrument. In this article, we will explore what sound hole covers are used for and why they are valuable to guitarists.
1. Feedback Reduction
One of the primary purposes of a sound hole cover is to reduce feedback when playing an acoustic guitar through amplification. When an acoustic guitar is connected to a microphone or pickup system and played at high volumes or in close proximity to speakers, it can be prone to feedback. This feedback occurs when the sound from the speakers is picked up by the guitar’s internal microphone or pickup and is then amplified again, creating a loop of unwanted noise.
Sound hole covers help mitigate this issue by blocking or dampening the sound waves that enter the guitar’s soundhole. This reduces the potential for feedback, allowing the guitarist to play at higher volumes without encountering disruptive squeals or howls.
2. Volume Control
Sound hole covers are also employed to control the volume of an acoustic guitar. By partially or fully covering the soundhole, the guitarist can reduce the amount of sound projected from the instrument. This can be particularly useful when practicing in a quiet setting, recording, or playing alongside other musicians. Soundhole covers enable acoustic guitarists to achieve a more subdued and controlled sound without compromising the instrument’s tonal quality.
3. Versatility in Performance
Acoustic guitarists often perform in various settings, from intimate acoustic sessions to full-band performances. Sound hole covers offer versatility by allowing guitarists to adjust the guitar’s volume and feedback susceptibility as needed. They can easily remove or insert the cover to adapt to different playing environments and requirements.
4. Preservation of Tone
Unlike some other methods of volume control, such as muting techniques or lowering the guitar’s volume knob, sound hole covers maintain the instrument’s natural tone and resonance. The soundhole cover does not interfere with the vibration of the guitar’s soundboard, ensuring that the acoustic guitar’s beautiful, warm tone remains intact.
5. Reduced Stage Noise
In a live performance setting, stage noise can be a challenge. Sound hole covers help reduce the guitar’s contribution to stage noise, allowing sound engineers to have better control over the mix. This can lead to a cleaner and more balanced sound for the audience.
Conclusion
Sound hole covers are unassuming yet valuable accessories for acoustic guitarists. They serve multiple purposes, including feedback reduction, volume control, versatility in performance, preservation of tone, and reduced stage noise. Whether you’re a professional musician performing on stage or a bedroom guitarist practicing in a shared space, sound hole covers provide a practical solution to common acoustic guitar challenges. These unassuming circular or oval-shaped devices may be small in size, but they play a big role in enhancing the functionality and adaptability of acoustic guitars in various musical contexts.

