RU2136121C1 - Acoustic system - Google Patents

Abstract

FIELD: acoustic equipment. SUBSTANCE: housing of acoustic system is designed as hollow parallelepiped with mounting holes for speakers. It has at least one wall, while housing and wall are designed as whole from material with high dampening characteristics. EFFECT: possibility to design high-power wide-band acoustic systems which lack vibration of housing walls and separation of high- and low-frequency compartments. 2 cl, 2 dwg

Description

 The invention relates to sound reproducing devices.

 A well-known acoustic column containing a housing with a hole for the speaker, made in the form of a hollow parallelepiped and equipped with at least one partition located parallel to the base of the housing (V.A. Vasiliev. Hams - to a village club. M., Radio and communications, 1983 , p. 55, fig. 57).

 The known device has a prefabricated housing, made, as a rule, of puff plywood by gluing or of plastic. During operation, gaps appear at joints where vibration occurs. This leads to the appearance of extraneous sounds. In addition, the inner surface of the body reflects sound waves randomly. At high sound power, the walls of the body vibrate. As a result, the dynamic characteristics of the speakers deteriorate.

 The essence of the invention lies in the fact that in an acoustic column containing a housing with a hole for the speaker, made in the form of a hollow parallelepiped and provided with at least one partition located parallel to the base of the housing, the housing additionally has mounting holes for the speakers, and one of the partitions is made for integral with the casing made of damping material for dividing the casing into high- and low-frequency compartments, moreover, the partitions are solid, and as a damping material Olza sintegran.

 This allows the manufacture of high-power speakers with a wide range of reproducible frequencies. A closed case with solid walls eliminates the vibration of the walls of the case and allows you to separate high and low frequency compartments.

 The drawing shows a vertical section of an acoustic column.

 The column contains a housing 1 with mounting holes 2, in which speakers 3 and 4 are installed. The housing is made in the form of a hollow parallelepiped and is equipped with at least one continuous partition 5. The housing 1 and the partition 5 are made in one piece from a material with high damping characteristics, for example from sintegran. The mounting holes 2 on the front side are covered with a decorative panel 6.

 The device operates as follows.

 When an electrical signal arrives at the speakers, they convert it into acoustic vibrations that propagate into the environment. The vibrations from the back of the speakers are damped by the material of the housing 1, which has high damping characteristics. The high-frequency and low-frequency compartments are separated by a soundproof partition and do not affect the operation of each other. At high power of sounding, the walls of the housing 1 do not vibrate, do not pass acoustic vibrations from the back of the speakers 2 and 3 into the surrounding space and thereby improve the sound quality of the speaker.

 Syntegran material has high damping characteristics and represents various fractions of hard rock connected by a polymer binder.

Claims (2)

 1. An acoustic column containing a housing with a hole for the speaker, made in the form of a hollow parallelepiped and equipped with at least one partition located parallel to the base of the housing, characterized in that the housing additionally has mounting holes for the speakers, and one of the partitions is made in one piece with a casing of damping material for dividing the casing into high- and low-frequency compartments, and the partitions are solid.  2. The acoustic column according to claim 1, characterized in that the housing and the partition are made of integran.