RU2617724C1 - Acoustic system with a set of interchangeable acoustic lenses - Google Patents

Abstract

FIELD: physics.

SUBSTANCE: acoustic system with a set of interchangeable acoustic lens comprises a housing with a linear array of the belt converters, on the each output channel of which a replaceable acoustic lens of the set of acoustic lenses is mounted by the quick release fastenings, provided on the front wall of the acoustic system housing, each of which is in the form of the trapezoidal prism with the open opposing parallel lateral faces to form the inlet and outlet openings to the audio channel, the lateral face from the inlet opening side enters the waveguide, the shape of which corresponds to the shape of the linear array output channel, the sound lens channel is divided into tracks by the trapezoidal blades, horizontally or vertically disposed between the lateral lens walls, wherein each lens has opening angles horizontally and vertically, different from the other lenses.

EFFECT: providing the possibility of sound propagation from the linear array with the tape transducer at the desired angle vertically and horizontally, symmetrically and asymmetrically.

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Description

The invention relates to audio equipment, namely to extenders of vertical and horizontal directivity of a tape acoustic transducer, and can be used in professional acoustic systems (linear arrays) and any other acoustic systems with a tape transducer.

The tape converter is a flat frame placed in a magnetic field with a membrane and a voice coil fixed to it, which is a spiral made of an electric wire deposited on the membrane. The tape converter has a narrow vertical directivity, and the expansion of the channel, which is vertically provided for in the known drivers, that extends vertically through the acoustic membrane, is not enough (in a certain field of application), which necessitates an additional expansion of the vertical direction.

The prior art acoustic transducers with installed stationary acoustic lenses, manufactured by well-known manufacturers of audio equipment "Alcons Audio" ( w w w.alconsaudio.com ) and "Stage Accompany" ( www.sta g eaccompany.com ).

The closest analogue of the proposed solution is an acoustic lens in a linear array with a tape transducer (application for US patent No. 2007160233, 07/12/2007), which is an acoustic expander mounted by screws in the transducer housing. The lens includes parallel metal trapezoidal fins, narrow facing the transducer.

A disadvantage of the known lenses is the impossibility of promptly or the inability in principle to change the opening angle of a single element of a linear array laid at the factory.

The technical result of the claimed technical solution is to provide the possibility of sound propagation from a linear array with a tape converter to the required angle vertically and horizontally symmetrically and asymmetrically by installing the appropriate lens.

The claimed technical result is achieved due to the design of a removable acoustic lens in a linear array with a tape transducer, made in the form of a trapezoidal prism with open oppositely arranged parallel side faces with the formation of the input and output openings of the sound channel, while the side face from the side of the inlet passes into the waveguide, the shape of which corresponds to the shape of the output channel of the linear array, the sound channel of the lens is divided into tracks by trapezoidal blades horizontally and or vertically between the side walls of the lens.

The lens is made of polymeric material.

The speaker system is available with a set of interchangeable lenses suitable for each particular column. Due to the fact that the lenses in the set are made with different angles of vertical and horizontal opening of the tape emitter, it is possible to narrowly focus the energy of the upper elements of the linear array without intersecting sound waves from neighboring elements, placing the lenses with an angle of 5-7 degrees. To transmit sound over long distances (50 ÷ 100 m), at the same time, you can install acoustic lenses in the lower elements of the linear array with a vertical opening angle of 15 ÷ 20 degrees for a wide sound coverage area for short distances (3 ÷ 15 m). Installing a lens with a vertical opening angle of 30 ÷ 50 degrees allows you to use the array element even in the singular, while covering a wide area of acoustic coverage. Thus, the optimal expansion of the vertical orientation of the tape transducer, as well as the propagation of sound from the speaker system to the near and far zones of the site, the hall, and the premises, using the minimum number of linear arrays with tape converters, is ensured.

Further, the solution is illustrated by reference to the figures, which show the following:

FIG. 1 - speaker housing with one tape transducer with a lens.

FIG. 2 - a speaker enclosure with a linear array.

FIG. 3 is a general view of an acoustic lens.

FIG. 4 are examples of lenses in a kit.

The lens is made of plastics (for example, ABS, polyamide, or polypropylene) in the form of a trapezoidal prism with open oppositely arranged parallel side faces with the formation of the inlet and outlet openings of the sound channel.

The lens includes side walls 1, the planes of which are located at an angle of 90 ÷ 180 ° to each other on a horizontal plane. Horizontally between the side walls are trapezoidal blades 2, molded from plastic together with the side walls. The side face from the inlet side passes into the waveguide 3, the shape of which corresponds to the shape of the output sound channel 4 of the linear array of tape converters.

The plastic lens is held on the array due to the coupling of magnets 6, mounted on the front walls of the speaker housing 5, and metal disks glued to the lens 7, plastic clips, Velcro tapes and other similar fasteners can also be used as quick-detachable mounts with the installation corresponding to each other parts on the front walls of the speaker housing and the side walls of the lens.

The design of the guide vanes 2 and the angles between them may vary depending on the task.

Each lens in the set is suitable only for a specific acoustic system, including a housing with a linear array (Fig. 2) of tape converters, on the output channel of each of which a removable acoustic lens is installed from a set of many acoustic lenses using quick-detachable mounts and a large number of lenses are produced with it different opening angles for different tasks.

Claims (1)

An acoustic system with a set of interchangeable acoustic lenses, characterized in that it includes a housing with a linear array of tape converters, on the output channel of each of which a removable acoustic lens is installed from a set of many acoustic lenses by means of quick-detachable mounts made on the front walls of the speaker system, each of which made in the form of a trapezoidal prism with open oppositely arranged parallel side faces with the formation of the input and output openings of the sound channel, the side face from the inlet side passes into the waveguide, the shape of which corresponds to the shape of the output channel of the linear array, the sound channel of the lens is divided into tracks by trapezoidal blades, horizontally or vertically located between the side walls of the lens, with each lens having horizontal opening angles and verticals other than the rest of the lenses in the kit.

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