English to French Law/Patents Engineering (general) internal combustion engine

A pneumatically insulating and acoustically permeable symposer device (8) for a noise transmission duct (7) of an internal combustion engine.

Along the amplification pipe there is arranged a symposer device, which is pneumatically insulating and acoustically permeable and fulfils the
function of forbidding pressure losses in the intake duct without jeopardizing the transmission of sound waves.

Some known symposer devices comprise a flexible membrane, which seals in a fluid—tight manner and, at the same time , is free to deform in order to permit the transmission of sound waves.