Class / Patent application number | Description | Number of patent applications / Date published |
181293000 | With channels or cavities in surface layer | 10 |
20100065369 | Acoustic structure and acoustic room - In a hollow member, a portion of a hollow region adjoining and communicating with an opening portion is constructed as an intermediate layer. The intermediate layer is constructed in such a manner that, when a reflective surface radiates reflected waves corresponding to incident sound waves falling from an external space on the opening portion and the reflective surface of the hollow member, a phase, in the opening portion, of reflected waves produced by resonance of the resonator in response to the incident waves differs from a phase of reflected waves on the reflective surface, and that the absolute value of a value obtained by dividing a specific acoustic impedance of the opening portion by a characteristic impedance of a medium of the opening portion is less than one. A sound absorbing effect through resonance-based action in the opening portion and a sound scattering effect through a flow of gas molecules. | 03-18-2010 |
20110284319 | Acoustic Panels, Apparatus and Assemblies with Airflow-Resistive Layers Attached to Sound Incident Surfaces - An acoustic panel includes a main body portion having a substantially planar front surface for orientation toward a sound source and an opposite, substantially convoluted rear surface. An airflow-resistive layer of material is secured to the planar front surface in face-to-face contacting relationship. The airflow-resistive layer of material may have a specific airflow resistance of between about | 11-24-2011 |
20120018247 | Wedge-shaped acoustic diffuser and method of installation - A wedge-shaped, number theoretical acoustic diffuser both diffuses and reflects sound while eliminating wasted space created by prior art. The inventive diffuser consists of wells of continuously variable depths which provide wide-bandwidth diffusion in a single dimension. The back of the wells are reflective planes of a plurality of angles that direct energy away from the sound source. The invention may be installed in the upper corners of a room, with the deepest end of the wedge-shape up and tapering down to the thinnest end of the wedge shape. This installation allows floor standing furniture or other objects to be placed against the wall, an impossibility with the installation of prior art. The present invention may be installed as an array in which the deepest ends of the wedge shape are butted together. This formation splits and reflects sound in two different directions both away from the sound source. | 01-26-2012 |
20120067665 | SOUND-ABSORBING NOISE BARRIER - A sound-absorbing noise barrier, more specifically to one comprising: a main body which has a front surface and a rear surface and extends horizontally and in which a space is formed between the front surface and the rear surface; and a sound-absorbing material which is accommodated in the space of the main body and is disposed at a distance away from the front surface and the rear surface respectively, wherein the front surface of the main body is formed with vertically oriented alternating projections and recesses and is formed with a plurality of sound-absorbing holes, and the overall cross-sectional area of the sound-absorbing holes is at least 20% of the cross-sectional area of the front surface. The sound-absorbing noise barrier of the present invention can be variously employed in construction and industrial products, has good sound-absorbing characteristics across a wide frequency range, and can present an aesthetically appealing external effect. | 03-22-2012 |
20130240290 | TYRE CAVITY NOISE ABSORBER - A tyre cavity noise absorber has a body of sound absorbing material and a support. The absorber is arranged such that, when installed in a tyre cavity and the tyre is stationary, the support supports the body of sound absorbing material in a position spaced from the inside circumferential wall of the tyre. The support may be flexible and allow the body of sound absorbing material to expand towards and contact the inside of the tyre when the tyre rotates. | 09-19-2013 |
20140291069 | NOISE BARRIER STRUCTURE WITH SOUND-ABSORBING AND SOUND-REDIRECTING PROPERTIES, AND HIGH PERFORMANCE SOUND ABSORBER FOR USE IN SUCH STRUCTURE - A noise structure having a barrier made of a generally sound redirecting material defining a surface of the barrier, and a plurality of sound absorbing boxes connected to this surface, each box comprising a rear wall and an extensively perforated front wall, the walls defining a longitudinal channel at least partially occupied by a filling made of a sound absorbing material, in which the rear wall is a substantially flat plane wall assembled parallel to and spaced apart from the surface of the barrier and is in its turn extensively perforated. | 10-02-2014 |
20140339015 | SOUND DIFFUSER INSPIRED BY CYMATICS PHENOMENON - Sound diffusers are important components in enhancing the quality of room acoustics. The present disclosure relates to a sound diffuser obtained by using properties of the cymatics phenomena. Cymatics is the study of sound and vibration made visible, typically on the surface of a plate, diaphragm or membrane. Two examples of diffusers are designed by the cymatic shapes and modeled by using a quadratic quadratic residue sequence. It is found that this type of acoustic diffusers can be used to maintain the acoustic energy in a room and at the same time can treat unwanted echoes and reflections by scattering sound waves in many directions. The design allows for creating different interior space designs by changing the arrangement of the diffuser panels, and this leads to different applications for the diffusers. | 11-20-2014 |
20160111076 | Particulate Sound Absorption Board and Preparation Method Thereof - A particulate sound absorption board and its preparation method. The said particulate sound absorption board consists of binding agent and sound absorption particle; the external surface of sound absorption particle is covered with a layer of binding agent, and the angularity coefficient of particle covered with binding agent is less than 1.3; the said sound absorption particle consists of skeleton particle and filling particle, in which the former is used for sound absorption board skeleton, and the latter flows into the pore between skeleton particles to form sound absorption pore, and the average diameter of cross section of sound absorption pore is 0.07 mm. The two-stage manufacturing technology (i.e. coating, curing and then shaping) is adopted for the said preparation method to prevent the pore between particles from being blocked by excess binding agent, and further improve the angularity coefficient of particle. | 04-21-2016 |
20160203812 | Underwater Noise Abatement Panel and Resonator Structure | 07-14-2016 |
20180025713 | A Panel for Sound Suppression | 01-25-2018 |