Abstract: A megaphone comprises a rigid but bendable material with a tapered shape. When the material is folded, the produced megaphone has a small opening at one end and a larger opening at the other end. The megaphone has edges that form an opening along the side such that when pressure is applied to the edges the opening expands allowing the megaphone to be positioned on a person's arm or leg. Once positioned on the arm of leg the rigidity of the material causes the megaphone return to its original cone shape. The megaphone can enclose around a user's arm or leg for storage purposes during an event. Information can be displayed on the surface of the megaphone. The megaphone of the present invention can be folded and unfolded.

Abstract: A megaphone popcorn cup is provided. The cup includes a first end, which is open to an interior of the cup, and a second end, which has a smaller diameter than the first end. The cup has a side wall with overlapping first and second side edges that are attached to one another. An end cap at least partially seals the second end. The end cap is vertically offset from the second end toward the first end and is formed with the side wall as a single, continuous piece of material.

Abstract: To provide a flexible polyurethane foam having improved sound absorbing properties in a low frequency region. A process for producing a flexible polyurethane foam which comprises foaming a starting material composition (E) comprising a high molecular weight polyoxyalkylene polyol (A), an organic polyisocyanate compound (B), a blowing agent (C) and a catalyst (D) in a closed mold, characterized in that at least a part of the high molecular weight polyoxyalkylene polyol (A) is a polyoxyalkylene polyol (p) having at least two hydroxyl groups on the average and having a molecular weight (Mc) per hydroxyl group of from 1,800 to 2,800 and a total unsaturation value (USV) of at most 0.08 meq/g, and that the air flowability of a flexible polyurethane foam obtained by foaming the starting material composition (E) in a thickness of 26 mm, is at most 0.085 m3/min.

Abstract: A megaphone popcorn cup is provided. The cup includes a first end, which is open to an interior of the cup, and a second end, which has a smaller diameter than the first end. The cup has a side wall with overlapping first and second side edges that are attached to one another. An end cap at least partially seals the second end. The end cap is vertically offset from the second end toward the first end and is formed with the side wall as a single, continuous piece of material.

Abstract: A mounting assembly for removably supporting a microphone in an operative position and in a manner which will protect the microphone against attenuating high impact phonetic peaks. A plurality of support assemblies are selectively attachable to one another to assume a variety of predetermined individually selectable configurations, wherein each of the predetermined configurations are determinative of a preferred operative orientation of the microphone. The plurality of support assemblies include a microphone support structured, to suspend the microphone in a predetermined orientation; a filter support structured, to adjustably support a filter in a substantially aligned, protective relation to the microphone; and an auxiliary support, structured to be removably and adjustably attached in supporting relation to at least one of said filter or microphone supports.

Abstract: A cup is readily converted to an acoustic megaphone by removal of the base. The paper construction, enabled by the features of the invention, offers a good printing surface and simultaneously ensures that the cup is biodegradable. In a first embodiment, a removable tape seal is used to releasably seal and retain a cup bottom to cup side walls. In a second embodiment, a more permanent seal is provided, along with a tear cord. Other embodiments illustrate pull tabs, handles, and a releasable adhesive. The base may also only be partially separated, thereby opening the cup into a horn, while still retaining the base to reduce the amount of waste paper which may become scattered.

Abstract: A speaker system comprises an acoustic panel. The acoustic panel is constructed of a plurality of thin plate-like sound absorbing panels provided close to the loudspeaker and arranged such that major surfaces thereof are disposed with a predetermined space therebetween so that the front space of the loudspeaker is opened for guiding a sound wave forwardly to radiate along the surface of the panels, while components of the sound wave having a radiation direction oblique to the major central axis of the sound absorbing panels are attenuated due to propagation through the sound absorbing panels. The sound absorbing panels are made of a porous sound absorbing material in which metal powders of Al, Ni, Cu, and others are sintered. In the case where one side of the acoustic panel is opened, it is preferable to provide a sound absorbing material at least at that opening and to further enclose the periphery of the sound absorbing material with a sound insulating material.

Abstract: An exhaust duct part for the outflow of a fluid, in particular for the outflow of the exhaust gases of an internal combustion engine, includes a continuous external casing of substantially constant cross-section and containing at least one acoustic attenuation unit positioned longitudinally in the external casing so as to delimit at least one fluid transfer section of a length determined in such a way that the transfer section participates in the acoustic attenuation function of the exhaust duct part. The attenuation unit includes an internal casing of substantially constant cross-section and, together with the external casing, delimits at least one longitudinal peripheral channel for the passage of the fluid. The internal casing has a circular or elliptical cross-section and includes at least one zone deformed radially in such a way as to increase the surface of exchange between the fluid and the attenuation unit.

Abstract: A speaker system which has a speaker unit with a diaphragm and an acoustic path provided on the front side of the diaphragm so as to guide sound waves emitted from the diaphragm. The acoustic path is defined by a sound absorbing member. The space in the acoustic path and the sound absorbing member is separated by a partition member which is disposed in such a manner that at least a portion of the sound absorbing member is exposed to the space in the acoustic path, except that the portion of the sound absorbing member just adjacent the diaphragm is not exposed to the acoustic path. This arrangement eliminates peaks and troughs of resonance determined by the length of the acoustic path, so that flat sound pressure frequency characteristics can be obtained over a wide range up to high-pitch tone region.

Abstract: A megaphone is formed from a self-supporting flexible plastic sheet. The sheet is wrapped with overlapping side edges to form a horn shaped member. The overlapping edges are releasably interlocked by edge slots and interconnecting edge arms. A separate mouthpiece has a tube which telescopes into the narrow mouth end of the horn and has an outer shaped end for coupling to the user's lips. The plastic sheet may be rolled into a compact tubular roll. The mouthpiece is placed over the roll to maintain the rolled configuration for storage and transport. The horn sheets can be readily mass produced by stamping and the mouthpiece by molding.

Abstract: The invention pertains to electric horns for automobiles wherein a metal horn motor housing is assembled to a sound projector formed of synthetic plastic. A metal insert is molded into the projector having a metal flange extending from the projector adjacent a projector mounting surface whereby the insert flange is deformed upon the motor housing to produce an effective mechanical interconnection and assembly of the motor housing and projector.

Abstract: A loudspeaker and horn combination having desirable sound clarity characteristics and having a desirable per unit of electric power input to per unit of sound output ratio can be constructed using a horn body of one or more parts of a rigid, closed cell polyurethane foam material having a smooth exterior skin or surface shaped so as to include an internal horn cavity. A speaker is located so that its diaphragm extends across an entrance end of the cavity. The cavity is shaped in a bilaterally symmetrical manner so as to include a sound chamber region adjacent to and leading from the speaker diaphragm, this sound chamber region having a restricted throat located intermediate its ends and having a continuous curvature between its ends, a flare region diverging outwardly from the end of the sound cavity region remote from the speaker and a transitional region located generally between the flare and sound cavity regions so as to connect the adjacent surfaces of these regions.

Abstract: An electrically driven loudspeaker is coupled to the atmosphere, which is to carry sound to the human ear, through a hollow coupler the inlet end of which has a cross sectional area comparable to the effective area of the loudspeaker, said cross sectional area decreasing progressively from said inlet end to an outlet end of substantially smaller cross sectional area. In a specific embodiment of the invention, an exponential horn is formed within the confines of a loudspeaker cabinet enclosure, and the inlet end of the horn is coupled to the electrically driven loudspeaker by means of the hollow coupler also formed within the cabinet enclosure. The outlet end of the coupler has the same cross sectional area and shape as the inlet end of the horn.

Abstract: A combination loudspeaker and sign holder having a housing which has enlarged flat parallel end walls joined by narrow end walls. Within the housing is an acoustic horn having a vertical axis and horn end walls diverging downwardly and outwardly. The horn end walls are secured to the housing side walls, and the horn side walls are constituted by the housing side walls. Atop the horn is a speaker which radiates downwardly through the horn and the open bottom of the housing. Preferably the horn end and top walls are formed by a single bent strip of corrugated plastic and the housing is formed of the same material. Tabs in the housing allow it to be suspended from a store ceiling, and a sleeve bearing advertising material may be fitted over the housing. Alternatively, advertising material may be attached to the sides of the housing.

Abstract: An integrally formed cabinet for a loudspeaker having a preformed horn for dispersing acoustic energy with minimum distortion.