Screen fabric transparency requires tension and verification under 1 dB
Evidence
An acoustically transparent screen is a simple device for revealing truths, but it is essential to test the acoustical transmission loss of the material by performing a simple on-axis frequency response measurement, then place the material between the loudspeaker and microphone, and measure again. There will be a difference, but it should be less than 1 dB, even at the highest frequencies, as it is in a good grille cloth. Polyester double-knit is a commonly available possibility, and there are dedicated grille cloth fabrics in many fabric stores. However, care must be taken to ensure that the fabric when tested and used is under slight tension to open the weave—it is this that is responsible for the acoustical transparency. — Toole, Floyd E, Sound reproduction- the acoustics and…, 1114
Categorization
Category: Factual Claims
- SEED: A practical-build article angle: how to set up a proper blind-listen screen at home, including fabric selection and the tension trick.
Related
- Screen fabric must lose under one dB yet remain porous enough to conceal speakers (similarity 0.93)
- Diffusers manipulate only part of the spectrum and can act as absorbers when fabric-covered (similarity 0.79)
Broader Connections
- Fabric-covered diffusers absorb sound instead of scattering it
#complicates(0.90) — Toole, Floyd E, Sound reproduction- the acoustics and…, 1034