CN202261758U

CN202261758U - Broadcast horn loudspeaker

Info

Publication number: CN202261758U
Application number: CN2011203064327U
Authority: CN
Inventors: 王齐祥
Original assignee: Guangzhou DSPPA Audio Co Ltd
Current assignee: Guangzhou DSPPA Audio Co Ltd
Priority date: 2011-08-22
Filing date: 2011-08-22
Publication date: 2012-05-30
Anticipated expiration: 2021-08-22

Abstract

The utility model discloses a broadcast horn loudspeaker including an outer cylinder extending outward gradually. A direct- radiation-type electric cone loudspeaker having an inward opening is arranged in the outer cylinder in a position close to a rear end of the outer cylinder. The direct- radiation-type electric cone loudspeaker connects with a direct- radiation-type electric ball loudspeaker through a shared rear cavity. An opening of the direct- radiation-type electric ball loudspeaker connects with an inner cylinder extending gradually. The extending manner of the inner cylinder is the same with the extending manner of the outer cylinder. In the utility model, the direct- radiation-type electric cone loudspeaker is adopted for low frequency range horn driving and the direct- radiation-type electric ball loudspeaker is adopted for high frequency range horn driving. In a condition of maintaining the high sensitivity, the standing wave distortion and the transient response of a horn are reduced. And the low frequency response is improved, a frequency band width is increased, and the voice distortion is reduced.

Description

A kind of broadcasting horn speaker

Technical field

The utility model relates to a kind of loud speaker, especially a kind of broadcasting horn speaker.

Background technology

The broadcasting horn speaker is commonly called as " loudspeaker ", i.e. the sensitivity of this kind loud speaker is very high, has very high electro-acoustic conversion efficiency, and the acoustic radiating distance.Generally, the characteristic ssensitivity level of broadcasting horn speaker is 100dB～110dB, and direct-radiator speaker is between 85dB～95dB, and both differ about 15dB.Under the situation of equal-wattage of feeding, the former acoustic radiating distance is far away more than five times than the latter.For example, suppose that the acoustic radiating distance of certain direct-radiator speaker is 200 meters, then the radiation of the broadcasting horn speaker of equal-wattage ability is more than 1,000 meter.Just because of these outstanding advantages of broadcasting horn speaker, it has obtained using widely in countryside broadcast, emergent broadcast world.

Yet,, make it in numerous areas such as civilian sound equipment, professional sound equipment, service broadcast, background music broadcasting, be difficult to promote because there is the relatively poor shortcoming of tonequality in the broadcasting horn speaker.The shortcoming of broadcasting horn speaker is caused by following two aspect reasons:

One of which, horn speaker be if will obtain lower cut-off frequency and stronger directive property, horn then to do long enough, number mouth is sufficiently large.Yet the ten minutes that but very is not easy to transportation and installation, particularly some hand-hold type is not easy to carry.After it is designed to three sections accordion structures (with reference to Fig. 2); Its contraction in length is near original 1/3rd, effectively addresses the above problem, and but makes the obvious variation of tonequality; Because in the horn of three sections accordion structures, coming back reflective, sound wave produced many standing waves; So distortion is bigger, transient response is relatively poor, and high frequency attenuation is very fast.But weigh the advantages and disadvantages, mainly still selected three sections accordion structures during deisgn product.

They are two years old; The driver element of broadcasting horn speaker is to make institute's driven air produce very high " volume velocity ", and its vibrating diaphragm must be very hard, and the vibrating diaphragm discomfort of dome loudspeaker is fit to do too greatly; This has caused the resonance frequency of broadcasting horn speaker high, and LF-response is poor.Because the cup air is caused the sound nonlinear distortion to increase by Fast Compression and expansion.This becomes people the demanding occasion of tonequality is not being selected one of reason of broadcasting by horn speaker.

Based on above-mentioned situation, we improve the structure of broadcasting horn speaker, under the constant situation of profile, have both kept the original advantage of broadcasting horn speaker, have effectively improved its shortcoming again.

The utility model content

The technical problem that the utility model will solve is: under profile, the constant situation of electro-acoustic conversion efficiency, a kind of tonequality and LF-response improved is provided, extending bandwidth reduces the broadcasting horn speaker of distortion.

In order to solve the problems of the technologies described above, the technical scheme that the utility model adopted is:

A kind of broadcasting horn speaker; Comprise an outside urceolus that launches gradually; In urceolus, be provided with the electronic cone loudspeaker of the inside direct radiator type of an opening near place, its rear end; The electronic cone loudspeaker of said direct radiator type is connected with the electronic spherical loud speaker of a direct radiant type through a shared back cavity, and the opening part of the electronic spherical loud speaker of said direct radiator type is connected with the inner core that launches gradually, and the expansion direction of said inner core is identical with the expansion direction of urceolus.

Further as preferred embodiment, the electronic cone loudspeaker of said direct radiator type is connected through shared back cavity is coaxial with the electronic spherical loud speaker of direct radiator type.

The beneficial effect of the utility model is: the utility model broadcasting horn speaker, and traditional broadcast horn speaker electro-acoustic conversion efficiency is constant keeping, under the constant basically situation of profile and weatherability; Drive through adopting the electronic taper woofer of direct radiator type to make the low-frequency range horn; The electronic spherical loud speaker of direct radiator type drives as the high band horn, is keeping having reduced the standing wave distortion and the transient response of horn under the highly sensitive situation; And improved LF-response; Expand frequency bandwidth, reduced voice distortion, improved the intelligibility of language.

Description of drawings

Be described further below in conjunction with the embodiment of accompanying drawing the utility model:

Fig. 1 is the example structure diagrammatic sketch of the utility model horn speaker;

Fig. 2 is the structural representation of three sections collapsible horn speakers;

Fig. 3 is the structural representation of the electronic cone loudspeaker of direct radiator type;

Fig. 4 is the structural representation of the electronic spherical loud speaker of direct radiator type.

Embodiment

With reference to Fig. 1; A kind of broadcasting horn speaker; Comprise an outside urceolus 1 that launches gradually, in urceolus, be provided with the electronic cone loudspeaker 3 of the inside direct radiator type of an opening near 11 places, its rear end, the electronic cone loudspeaker 3 of direct radiator type is connected with the electronic spherical loud speaker 4 of a direct radiant type through a shared back cavity 5; The opening part of the electronic spherical loud speaker 4 of said direct radiator type is connected with the inner core 2 that launches gradually, and the expansion direction of inner core 2 is identical with the expansion direction of urceolus 1.

Further, the electronic cone loudspeaker 3 of direct radiator type and the electronic spherical loud speaker 4 of direct radiator type are through shared 5 coaxial connections of back cavity, and the sound that has guaranteed above-mentioned two loud speakers like this is from same sound source.

The utility model broadcasting horn speaker; For widening frequency band; Adopt two divided-frequency combination loudspeaker system, adopt the electronic spherical loud speaker 4 of direct radiator type (with reference to Fig. 4) to drive as the high band horn, the electronic cone loudspeaker of direct radiator type (with reference to Fig. 3) drives as the low-frequency range horn; In order to reduce the standing wave distortion and the transient response of horn, in the radiation port of driver element a suitable one-part form horn is installed, avoid sound wave in horn repeatedly the contact fold back penetrate, reduce the generation and the high frequency loss of standing wave; In order to reduce the non-line distortion of horn air, the high frequency playback upper limit is not to adopt the working method of high compression ratio, has reduced by the non-linear distortion that causes of air; In order to alleviate the weight of horn, horn uses aluminium to make; In order to make sound from same sound source, two horns adopt coaxial mounting means.

Through changing the inner volume of air of shared back cavity 5 and the opening size and the length of urceolus 1, can obtain different low-frequency cut-off frequencies; Through changing the compression ratio of horn aditus laryngis and vibrating diaphragm, can obtain different high frequency limit frequencies; Through changing the difformity that horn launches, can obtain different directional properties.

More than be that preferable enforcement to the utility model specifies; But the utility model is created and is not limited to said embodiment; Those of ordinary skill in the art make all equivalent variations or replacement under the prerequisite of the utility model spirit, also can doing, and distortion that these are equal to or replacement all are included in the application's claim institute restricted portion.

Claims

1. broadcasting horn speaker; Comprise an outside urceolus (1) that launches gradually; In urceolus, locate to be provided with the electronic cone loudspeaker of the inside direct radiator type of an opening (3) near its rear end (11); It is characterized in that: the electronic cone loudspeaker of said direct radiator type (3) is connected with a direct electronic spherical loud speaker of radiant type (4) through a shared back cavity (5); The opening part of the electronic spherical loud speaker of said direct radiator type (4) is connected with the inner core (2) that launches gradually, and the expansion direction of said inner core (2) is identical with the expansion direction of urceolus (1).

2. a kind of broadcasting horn speaker according to claim 1 is characterized in that: the electronic cone loudspeaker of said direct radiator type (3) and the electronic spherical loud speaker of direct radiator type (4) are through coaxial connection of shared back cavity (5).