SU942245A1

SU942245A1 - Leaf-type reverberator

Info

Publication number: SU942245A1
Application number: SU803001877A
Authority: SU
Inventors: Сергей Матвеевич Иванов
Original assignee: Предприятие П/Я Р-6947
Priority date: 1980-10-28
Filing date: 1980-10-28
Publication date: 1982-07-07

Description

(54) ЛИСТОВОЙ РЕВЕРБЕРАТОР(54) SHEET REVERB

1one

Изобрегение относитс к приборосгроению , в часгноеги к электроакустике, и может быть использовано при конструировании листовых ревербераторов. The image is related to instrumentation, in time to electroacoustics, and can be used in the design of sheet reverberators.

Известные листовые ревербераторы содержат пр моугольный металлический лист, укрепленный в опорной раме, и контактирующие с ним возбудитель и приемник колебаний Llj.Known sheet reverbs contain a rectangular metal sheet fixed in the support frame, and the pathogen and the oscillation receiver Llj in contact with it.

Распространение и отражение ог кра- jo ев листа изгибных колебаний моделирует процесс затухани звуковой энергии в реальных помещени х.The propagation and reflection of the edges of the sheet of bending vibrations simulates the process of attenuation of sound energy in real rooms.

Недостатками данного листового ревербератора вл ютс спад частотой ха- is рактеристики в области высоких частот, вызываемый инерционным характером сопротивлени листа, а также недостаточна , по сравнению с имекшей место в помещени х, плотность эхо-сигналов, осо-М бенно в области высоких частот.The disadvantages of this sheet reverberator are a drop in the frequency of the characteristic in the high-frequency region, caused by the inertial nature of the sheet resistance, and also insufficient, compared to the room space in the rooms, the density of the echo signals, especially in the high-frequency region.

Наиболее близким к предлагаемому вл етс ревербератор, содержащий пр моугольный металлический лист и контактирующие с ним возбудитель и приемник колебаний .The closest to the present invention is a reverb containing a rectangular metal sheet and a driver and an oscillation receiver in contact with it.

Дл коррекции частотной характеристики ревербератора в области высоких частот он снабжен упругим элементом в виде двух противодействующих пружин. Отражени , возникающие от концов пружин , частично увеличивают общую плотность эхо-сигналов. Однако, попуча&леа в известном устройстве, плотность эхосигналов недостаточно велика.In order to correct the frequency response of the reverberator in the high frequency region, it is equipped with an elastic element in the form of two opposing springs. Reflections arising from the ends of the springs partially increase the overall density of the echoes. However, with the & le in the known device, the echo density is not large enough.

Кроме того, реализовать такой упругий элемент довольно сложно, так как во избежание по влени нелинейных искажений , пружины строго идентичны.In addition, it is rather difficult to implement such an elastic element, since in order to avoid the appearance of nonlinear distortions, the springs are strictly identical.

Цель изобретени - улучшение качества звучани листового ревербератора, а также yiiporaeHHe его устройства.The purpose of the invention is to improve the sound quality of the sheet reverb, as well as its device yiiporaeHHe.

Claims

This goal is achieved by the fact that in the sheet reverser, containing a rectangular sheet and contact with the causative agent and an oscillation receiver, the sheet has slots along a curve with focusing properties, in which the exciter and the oscillation receiver are installed. The drawing shows the proposed usgust. The sheet reverb contains a rectangular sheet I, pathogen 2 and receiver 3 cola in contact with it, slot 4 is made in the sheet, the ellipse section 1 is located, in the foci of which (F-t and Fa) the oscillator and receiver are located. The device works as follows. At low and medium frequencies, the sheet oscillates as a whole and the slits do not affect the propagation pattern. At high frequencies, when the length of the bending wave becomes comparable to the size of the slot, some of the flexural vibrations are reflected from the slots. These additional reflections, superimposed on the reflection from the edge of the sheet, significantly enrich the overall vibrational pattern. To increase: the effectiveness of the effect of the slots should be placed along a curve with focusing properties, in the foci of which the excitations are set and the receiver of vibrations. Using the proposed sheet reverb improves the sound quality by increasing the echo density at high frequencies, reducing the frequency response in the high frequencies due to decreasing the path of the high-frequency components of the signal, increasing the diffuseness of the field due to the destruction of the standing waves. Claims of the sheet reverberator comprising a rectangular sheet and an exciter and an oscillation receiver in contact with it, characterized in that, in order to improve the sound quality of the reverb, slots along the curve possessing focusing properties are installed in the sheet and the exciter and receiver are fixed at the foci fluctuations. Sources of information taken into account in the examination 1. Drezen I.G. Electroacoustics and sound broadcasting. M., Sv eizdat, 1961, p. 526-5; 32.

2. Author's certificate of the USSR N 555536, cl. And 03 H 9/30, 1976 | (prototype).