http://www.freshpatents.com/Acoustics-dtnewntc181.php USPTO Class 181 - Acoustics en-us Fri, 19 Dec 2008 00:01:16 -0800 1000 Wednesday Thursday Friday Saturday Sunday 141 31 http://www.freshpatents.com/index.php?rss=true http://www.freshpatents.com/images/freshpatentsnav_rss.gif http://www.freshpatents.com/Automotive-speaker-enclosure-dt20081211ptan20080302594.php Fri, 19 Dec 2008 00:01:16 -0800 A speaker enclosure mounted within an internal wall of a vehicle may employ first and second enclosure halves that are vibration welded together to define an enclosure or cavity between the halves. A first leg and a second leg protrude from a bottom of the second half. The legs may... http://www.freshpatents.com/Horizontally-folded-reflex-ported-bass-horn-enclosure-dt20081211ptan20080302595.php Fri, 19 Dec 2008 00:01:16 -0800 A low frequency folded horn enclosure intended for use in proximity with at least one planar surface with access to the horn throat from the top of the enclosure. The horn is bifurcated at the threat and folds horizontally around a central trapezoid-shaped columnar back chamber which includes a phase-inverting... http://www.freshpatents.com/Diaphragm-muffler-and-method-of-use-dt20081211ptan20080302596.php Fri, 19 Dec 2008 00:01:16 -0800 A diaphragm muffler for quiet operation of a compressor imparting an above atmospheric pressure stream and a below atmospheric pressure stream. The diaphragm muffler including a diaphragm pressure chamber receiving the above atmospheric pressure stream; a diaphragm vacuum chamber receiving the below atmospheric pressure stream; and a flexible diaphragm dividing... http://www.freshpatents.com/Exhaust-system-dt20081211ptan20080302597.php Fri, 19 Dec 2008 00:01:16 -0800 An exhaust system (1) is provided for an internal combustion engine (4), especially in a motor vehicle, with two separate exhaust gas lines (2, 3) with a first sound transmission feature (7), which couples the two exhaust gas lines (2, 3) with one another, and with a control (9) for... http://www.freshpatents.com/Silencer-dt20081211ptan20080302598.php Fri, 19 Dec 2008 00:01:16 -0800 The invention relates to a silencer for an airborne sound conducting pipe system, including a housing enclosing an interior space, an inlet pipe having an outlet within the interior space, a bypass pipe branching off from inlet pipe within the housing and having an outlet, a control element actuated by... http://www.freshpatents.com/Apparatus-for-absorbing-acoustical-energy-and-use-thereof-dt20081211ptan20080302599.php Fri, 19 Dec 2008 00:01:16 -0800 An apparatus comprising a combination of a microphone and a composite acoustic panel. The composite acoustic panel comprises materials having different spectra of acoustic absorption. The materials may be integrated in a single layer or in a plurality of different layers....