Church Seats | 125 Hz | 250 Hz | 500 Hz | 1000 Hz | 2000 Hz | 4000 Hz |
Non-upholstered | 0.10 | 0.15 | 0.18 | 0.20 | 0.20 | 0.20 |
With 3 cm upholstery | 0.10 | 0.20 | 0.60 | 0.75 | 0.85 | 0.85 |