Diaphragmatic Absorber – Definition & Detailed Explanation – Acoustic Treatment Glossary

What is a Diaphragmatic Absorber?

A diaphragmatic absorber is a type of acoustic treatment device used to absorb sound energy in a room. It consists of a rigid front panel, a sealed air cavity, and a rear panel that acts as a diaphragm. When sound waves hit the front panel, they cause the diaphragm to vibrate, converting the sound energy into heat through friction within the air cavity. This process effectively reduces the level of sound energy in the room, helping to improve the overall acoustics.

How does a Diaphragmatic Absorber work?

Diaphragmatic absorbers work on the principle of mass-spring-mass resonance. The front panel acts as a mass, the air cavity acts as a spring, and the rear panel acts as another mass. When sound waves hit the front panel, they cause it to vibrate, which in turn causes the air in the cavity to compress and expand. This movement of air creates a pressure difference between the front and rear panels, causing the rear panel to vibrate in the opposite direction. This vibration dissipates the sound energy as heat, effectively absorbing the sound waves.

Where are Diaphragmatic Absorbers typically used?

Diaphragmatic absorbers are commonly used in recording studios, home theaters, concert halls, and other spaces where high-quality sound reproduction is desired. They are particularly effective at absorbing low-frequency sound waves, making them ideal for controlling bass resonance and improving the overall clarity of sound in a room.

What are the benefits of using Diaphragmatic Absorbers in acoustic treatment?

– Improved sound quality: Diaphragmatic absorbers help to reduce unwanted reflections and resonances, resulting in a cleaner and more accurate sound.
– Better bass control: Diaphragmatic absorbers are especially effective at absorbing low-frequency sound waves, helping to control bass resonance and improve the overall balance of sound in a room.
– Increased sound isolation: By absorbing sound energy, diaphragmatic absorbers can help to reduce noise transmission between rooms, creating a more acoustically isolated environment.

How are Diaphragmatic Absorbers different from other types of acoustic treatment?

Diaphragmatic absorbers differ from other types of acoustic treatment, such as foam panels or diffusers, in their ability to absorb low-frequency sound waves. While foam panels and diffusers are effective at absorbing mid and high frequencies, they are less effective at controlling bass resonance. Diaphragmatic absorbers, on the other hand, are specifically designed to target low-frequency sound waves, making them a valuable addition to any acoustic treatment plan.

What are some considerations to keep in mind when installing Diaphragmatic Absorbers?

– Placement: Diaphragmatic absorbers should be strategically placed in the room to target areas of high sound energy, such as corners or walls with strong reflections.
– Size and thickness: The size and thickness of the absorber will determine its effectiveness at absorbing sound energy. Thicker panels are generally more effective at absorbing low frequencies.
– Room size: The size of the room will also impact the effectiveness of diaphragmatic absorbers. Larger rooms may require multiple absorbers to achieve the desired level of sound control.