Wide-band membrane absorbers achieve dead-room acoustics in just 30 cm depth.
Evidence
These rooms require wide-band absorbers, as shown in Figure 7.27. These absorbers can take up a considerable amount of space. As one can see in Figure 7.27, the absorbers can occupy more than 50% of the volume. However, it is possible to use wide-band membrane absorbers, as discussed in Chapter 6, with a structure similar to that shown in Figure 6.48 with a limp membrane in place of the perforated sheet. Using this type of absorber, it is possible to achieve sufficient wide-band absorption with a depth of 30 cm, which allows this technique to be applied in much smaller rooms whose area is approximately 15 m2. — David M. Howard, Jamie Angus, Acoustics and Psychoacoustics, 2313
Related
- Deep porous absorbers give flat wideband absorption at the cost of space (similarity 0.84)
- Porous and resonant absorbers combine to achieve broad frequency coverage. (similarity 0.81)
- Porous sound absorbers work best when positioned at a quarter wavelength from a wall (similarity 0.80)
- Resistive absorbers only work where air particles move, which pushes them to high frequencies (similarity 0.80)
- Dense wall fabrics with empty space behind them become unwanted absorbers (similarity 0.79)
- A smaller listening zone needs smaller absorption patches (similarity 0.78)
- Air space behind absorbing panels cheaply improves absorption performance (similarity 0.78)