Complex QRD Diffuser [ standard N17 & inverse N17 ] за заден зид (control room)
- design frequency 450 hz
- scatter 225 Hz Diffuse 450 Hz HF cutoff 4300 Hz
- minimum distance to seating position 2.29m (3 times wavelength of lowest diffusion frequency)
- good result: Plate frequency of 7650 hz is higher than HF cutoff of 4300 hz, the HF cutoff frequency of 4300 hz is 9.5 times the design frequency of 450 hz
- true diffusion frequencies: 450 900 1350 1800 2250 2700 3150 3600 4050 hz