| 摘要 |
<p>Comprises a three way duct formed by two shell half pairs 9 and 10 which overlap to define central region 18. Part of the ducting is perforated. Baffle plate 32, also perforated, is disposed in the region 18 and resonant chambers 17 and 25 are formed at the ends of silencer box 1. Packing material may be provided between walls 4 and 5 around the perforated regions of the ducting. <IMAGE></p> |
