A kind of broadcast system
Technical field
The present invention relates to broadcast technology fields, more particularly, to a kind of broadcast system.
Background technique
In the broadcast system in rural area, loudspeaker are main broadcast terminals, for audio model to be passed to audience.Especially
Outdoor loudspeaker are set, and in order to which audio signal is passed to audience as far as possible, loudspeaker are generally provided with a circular cone
The cover of shape.But this also brings some problems, exactly may feel ear-piercing from the closer audience of loudspeaker, but from loudspeaker
Remote audience can think that sound is too light again.
Summary of the invention
The present invention aiming at the shortcomings in the prior art, provides a kind of broadcast system, can allow audience in certain distance
The sound heard is similar.
In order to solve the above-mentioned technical problem, the present invention is addressed by following technical proposals: a kind of broadcast system, including
Signal input device, conversion modulator, transmitter and broadcast terminal, the broadcast terminal include loudspeaker, and the loudspeaker include hair
Sound body further includes second cover with first cover of sounding mates, and second cover is arranged described first
On the outside of cover, the hole communicated with second cover is provided on first cover, the taper of second cover is greater than institute
State the taper of the first cover.
In above-mentioned technical proposal, it is preferred that first cover and second cover are by the good material of sound insulation value
Material is made.
In above-mentioned technical proposal, it is preferred that further include baffle, strip-shaped hole is provided on the baffle, bolt passes through bar shaped
Hole is connected on first cover later, and the different location of the strip-shaped hole, adjustable institute are fixed on by the bolt
State the area that baffle covers the through-hole.
In above-mentioned technical proposal, it is preferred that the baffle is longitudinally disposed along the side wall of first cover.
In above-mentioned technical proposal, it is preferred that the region of 5m or more from the ground is arranged in the loudspeaker.
Compared with prior art, the beneficial effects of the present invention are: due to the stronger sound insulation capabilities of the first cover, only from logical
The partial sound that hole enters region between the first cover and the second cover can just pass to audience, be located at the first cover and second
The intensity of acoustic wave in region can cover intracorporal sound wave less than first between cover, but since what sound wave transmitted being closer, also not
It will affect this part audience to listen to.Therefore we can achieve in a certain range, the volume that the audience of nearby and faraway hears
Much the same effect.By looking after and guiding the position of baffle, we are adjustable to enter region sound between the first cover and the second cover
The intensity of wave.
Detailed description of the invention
Fig. 1 is schematic diagram of the invention.
Fig. 2 is the schematic diagram of loudspeaker.
Fig. 3 is the schematic diagram of baffle.
Fig. 4 is the schematic diagram when present invention uses.
Specific embodiment
Present invention is further described in detail with attached drawing With reference to embodiment.
As shown in Figures 1 to 3, a kind of broadcast system, including signal input device, conversion modulator, transmitter and broadcast are eventually
End, the broadcast terminal includes loudspeaker, and the region of 5m or more from the ground is arranged in the loudspeaker, and the loudspeaker include sounding body 1,
The first cover 21 is matched with the sounding body 1, further includes second cover 22, second cover 22 setting is described the
On the outside of one cover 21, the hole 201 communicated with second cover 22 is provided on first cover 21.First cover 21
It is made with second cover 22 of the good material of sound insulation value, the taper of second cover is greater than first cover
Taper.
It further include baffle 3, the baffle 3 is longitudinally disposed along the side wall of first cover 21.It is arranged on the baffle 3
It is connected on first cover 21 after thering is strip-shaped hole 31, bolt 4 to pass through strip-shaped hole 31, institute is fixed on by the bolt 4
The different location of strip-shaped hole 31 is stated, the adjustable baffle 3 covers the area of the through-hole 201.
As shown in figure 4, in use, the sound that sounding body 1 issues is transmitted to farther away region by the first cover 21, due to
The taper of first cover is smaller, therefore has the function of certain convergence sound wave, therefore farther away audience in a certain range
It can be audible.Simultaneously for for closer audience, due to the stronger sound insulation capabilities of the first cover, only enter from through-hole 201
Partial sound to region between the first cover and the second cover can just pass to audience, be located at the first cover and the second cover it
Between the intensity of acoustic wave in region can be less than the first intracorporal sound wave of cover, but being closer due to sound wave transmitting will not influence
This part audience listens to.Therefore we can achieve in a certain range, and the volume that the audience of nearby and faraway hears is similar
Effect.By looking after and guiding the position of baffle, we are adjustable to enter the strong of region sound wave between the first cover and the second cover
Degree.