SU733118A1

SU733118A1 - Loudspeaker

Info

Publication number: SU733118A1
Application number: SU782677010A
Authority: SU
Inventors: Аркадий Петрович Болашенко
Original assignee: Предприятие П/Я В-8835
Priority date: 1978-10-20
Filing date: 1978-10-20
Publication date: 1980-05-05

Description

Изобретение относится к области приборостроения и может быть использовано при изготовлении малогабаритных громкоговорителей.The invention relates to the field of instrumentation and can be used in the manufacture of small speakers.

Известен громкоговоритель, содержащий ящик, на передней стенке которого укреплена электродинамическая головка [1].Known loudspeaker containing a box on the front wall of which is mounted an electrodynamic head [1].

Однако этот громкоговоритель недостаточно эффективно работает на низких частотах.However, this speaker does not work well enough at low frequencies.

Известен также громкоговоритель, содержащий ящик, на передней стенке которого с внутренней стороны установлена электродинамическая головка [2jj.Also known is a loudspeaker comprising a box, on the front wall of which an electrodynamic head is installed on the inside [2jj.

Недостатком этого громкоговорителя является недостаточная эффективность его работы на низких частотах и большие габариты.The disadvantage of this speaker is the lack of efficiency at low frequencies and large dimensions.

Целью изобретения является расширение диапазона звуковоспроизведения в области низких частот.The aim of the invention is to expand the range of sound reproduction in the low frequency region.

Поставленная цель достигается за счет того, что передняя стенка ящика снабжена акустическим экраном, выпол2 ненным в виде тонкостенной кольцевой втулки с бортами, обращенной внутрь полости ящика, при этом электродинамическая головка прикреплена к внутренней стороне бортов втулки акустического экрана и размещена симметрично относительно ее отверстия, при этом между внутренней стороной акустического экрана и электродинамической головкой выполнен акустический канал, который связывает внутреннюю полость ящика с полостью втулки.This goal is achieved due to the fact that the front wall of the box is equipped with an acoustic screen made in the form of a thin-walled ring sleeve with sides facing the inside of the box cavity, while the electrodynamic head is attached to the inside of the sides of the sleeve of the acoustic screen and placed symmetrically relative to its opening, between the inner side of the acoustic screen and the electrodynamic head there is an acoustic channel that connects the inner cavity of the box with the cavity of the sleeve.

На чертеже схематично показан гром, ₅ коговор ител ь.The drawing schematically shows thunder, _5th agreement.

Громкоговоритель содержит ящик 1, на передней стенке которого размещена электродинамическая головка 2, прикрепленная с помощью кронштейнов 3 к 20 внутренней стороне акустического экрана 4.The loudspeaker contains a box 1, on the front wall of which there is an electrodynamic head 2, attached using brackets 3 to 20 of the inner side of the acoustic screen 4.

Работа громкоговорителя аналогична работе громкоговорителя, снабженного фазоинвертирующим отверстием, обеспе3 чивающим эффект увеличения звукового давления в области низких частот.The operation of the loudspeaker is similar to the operation of a loudspeaker equipped with a phase-inverting hole, which provides the effect of increasing sound pressure in the low-frequency region.

Описанная конструкция громкоговорителя обеспечивает не только увеличение на 10-12 дБ отдачи в области низких частот, но и позволяет уменьшить габариты громкоговорителя.The described loudspeaker design provides not only an increase of 10-12 dB in the low-frequency response, but also reduces the size of the loudspeaker.

Claims

The invention relates to the field of instrumentation and can be used in the manufacture of small loudspeakers. A loudspeaker is known, which contains an electrodynamic head fixed on its front wall. However, this loudspeaker does not work effectively at low frequencies. Also known is a loudspeaker, a holding box, on the front wall of which an electrodynamic head 2T is installed on the inner side. The disadvantage of this loudspeaker is the lack of efficiency of its work at low frequencies and large dimensions. The aim of the invention is to expand the range of sound reproduction in the low frequency region. The goal is achieved due to the fact that the front wall of the box is provided with an acoustic screen made in the form of a thin-walled annular sleeve with sides facing the inside of the box cavity, while the electrodynamic head is attached to the inside of the sides of the sleeve of the acoustic screen and placed symmetrically relative to its opening, An acoustic channel is made between the inner side of the acoustic screen and the electrodynamic head, which connects the internal cavity of the box with the cavity of the sleeve. The drawing schematically shows a loudspeaker. The loudspeaker contains box 1, on the front wall of which an Electrodynamic head 2 is attached, attached with brackets 3. To the inner side of the acoustic screen 4. The loudspeaker is similar to the loudspeaker equipped with a phase-inverting aperture, providing E (} x () the increase in sound pressure in the area low frequency frequencies. The described loudspeaker design provides not only an increase of 1 -12 dB of recoil in the low-frequency range, but also makes it possible to reduce the dimensions of the loudspeaker. The formula of the invention: A loudspeaker containing chic, on the front wall of which an electrodynamic head is fixed on the inner side of it, characterized in that, in order to expand the range of reproduction in the low-frequency region, the front wall of the box is equipped with an acoustic screen made in the form of a thin-walled ring sleeve sides facing the cavity of the box, while the electrodynamic head is attached to the inner side of the sleeve and placed symmetrically with respect to its hole, while ezhdu inner side baffle and electrodynamic driver configured acoustic channel that binds the inner cavity of the box to the cavity of the sleeve. Sources of information taken into account during the examination 1. USSR author's certificate No. 588661, cl. H 04 B 1/28, 1975.

2. Efrussi MM. Loudspeakers and their application. M., Energie, 1976, p. 45-46 (prototype).