Packless silencer

Details Packless silencer Packless silencer

1979-04-17

1981-09-08

Hix, L. T.

Acoustics

Sound-modifying means

Muffler, fluid conducting type

181268, 181276, F01N 108, E04F 1704

Patent

active

042879620

ABSTRACT:
The construction described is a resistive sheet type of duct liner or duct silencer; i.e., a liner or silencer in which acoustical flow resistance is concentrated in a thin face sheet separating the flow passage and acoustical cavity rather than in an acoustically absorptive packing material filling the acoustical cavity. The invention disclosed is means for applying inexpensive perforated facings, similar to those in a conventional packed silencer, to provide resistive sheets which are effective in terms of noise dissipation and in terms of self-noise (noise generated by flow through the flow passages).

REFERENCES:
patent: 2043030 (1936-06-01), Bourne
patent: 2100655 (1937-11-01), Bourne
patent: 2252256 (1941-08-01), Harris
patent: 2265342 (1941-12-01), Bourne
patent: 2367473 (1945-01-01), Smith
patent: 2575233 (1951-11-01), Plasse
patent: 2759556 (1956-08-01), Baruch
patent: 2916101 (1959-12-01), Naman
patent: 3018840 (1962-01-01), Bourne et al.
patent: 3033307 (1962-05-01), Sanders et al.
patent: 3120877 (1964-02-01), Morris et al.
patent: 3195679 (1965-07-01), Duda et al.
patent: 3477231 (1969-11-01), Paulson
patent: 3481427 (1969-12-01), Dobbs et al.
patent: 3502171 (1970-03-01), Cowan
patent: 3503465 (1970-03-01), Kobayashi et al.
patent: 3511336 (1970-05-01), Rink et al.
patent: 3527318 (1970-09-01), Duthion et al.
patent: 3568791 (1971-05-01), Luxton
patent: 3618700 (1971-11-01), Bond et al.
patent: 3642093 (1972-02-01), Schach
patent: 3650348 (1972-03-01), Colebrook et al.
patent: 3692141 (1972-09-01), Labussiere et al.
patent: 3721389 (1973-03-01), MacKinnon et al.
patent: 3823796 (1974-07-01), Damiron
patent: 3854548 (1974-12-01), Suzuki
U. Ingard and D. Pridmore-Brown, "Propagation of Sound in a Duct with Constrictions", JASA, vol. 23, No. 6, pp. 689-694, Nov. 1951.
U. Ingard, "On the Theory and Design of Acoustic Resonators", JASA, vol. 25, No. 6, pp. 1037-1061, Nov. 1953.
U. Ingard and R. H. Lyon, "The Impedance of a Resistance Loaded Helmholtz Resonator", JASA, vol. 25, No. 5, pp. 854-857, Sep. 1953.
U. Ingard, "Perforated Facing and Sound Absorption", JASA, vol. 26, No. 2, pp. 151-154, Mar. 1954.
U. Ingard and S. Labate, "Acoustic Circulation Effects and the Non-Linear Impedance of Orifices", JASA, vol. 22, No. 2, pp. 211-218, Mar. 1950.
U. Ingard and R. H. Bolt, "A Free Field Method of Measuring the Absorption Coefficient of Acoustic Materials", JASA, vol. 23, No. 5, pp. 509-516, Sep. 1951.
U. Ingard and R. H. Bolt, "Absorption Characteristics of Acoustic Material with Perforated Facings", JASA, vol. 23, No. 5, pp. 533-540, Sep. 1951.
U. Ingard and D. Pridmore-Brown, "The Effect of Partitions in the Absorptive Lining of Sound-Attenuating Ducts", JASA, vol. 23, No. 5, pp. 589-590, Sep. 1951.

Affiliated with

Also associated with

Rating

Packless silencer does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Packless silencer, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Packless silencer will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1188561