Patent Number: 6,167,985

Title: .lambda./4 absorber with an adjustable band width

Abstract: .lambda./4-absorber with an adjustable band width comprising at least one .lambda./4-resonator (2) whose opening region (4) comprises a perforated head part (5). A further development of this .lambda./4-absorber is provided with a soft and/or heat exchanging material (7) in the floor region (3).

Inventors: Van Ligten; Robert (Zurich, CH)

Assignee: Rieter Automotive (International) AG

International Classification: G10K 11/00 (20060101); G10K 11/172 (20060101); E04B 001/82 ()

Expiration Date: 01/02/2018