Browse Prior Art Database

Acoustic Muffler having Low Airflow Impedance

IP.com Disclosure Number: IPCOM000106702D
Original Publication Date: 1993-Dec-01
Included in the Prior Art Database: 2005-Mar-21
Document File: 2 page(s) / 41K

Publishing Venue

IBM

Related People

Johnson III, LL: AUTHOR [+3]

Abstract

Disclosed is an air intake muffler which provides low impedance to airflow into an attached enclosure and also reduces acoustics transmission from within the enclosure to the outside.

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This is the abbreviated version, containing approximately 100% of the total text.

Acoustic Muffler having Low Airflow Impedance

      Disclosed is an air intake muffler which provides low impedance
to airflow into an attached enclosure and also reduces acoustics
transmission from within the enclosure to the outside.

      Fig. 1 shows that the muffler consists of two chambers, 1 and
2, separated by a plate with opening in the middle, 3.  The muffler
is covered with the top cover 4.  Fans/blowers 5, located within the
enclosure 8, draws air from the outside through vent openings 6, into
the lower chamber, and then through the separator plate to the upper
chamber.  The air then curls around the intake ducts 7, into the fans
located within the enclosure.  An inverted exhaust muffler of the
same construction may be used to vent the air from the enclosure to
the outside.

      Fig. 2 shows a cross section of the muffler.  The muffler
design prevents direct noise transmission from noise generating
components within the enclosure by bounding the acoustic waves within
the muffler chambers and being absorbed by the acoustic absorption
pads 9, strategically located within the muffler.