CN2250614Y - Loud-speaker connected with wave trap - Google Patents

Abstract

The utility model relates to a loud-speaker (a trumpet) connected with a wave trap. The utility model is composed of a loud-speaker and a wave trap, wherein, the loud-speaker is composed of a magnetic steel, a voice coil, a carton and a spring; the wave trap which is a passive two-terminal network device is connected in series with the loud-speaker by an output line in one end of the loud-speaker. The utility model has the advantages of low cost, simple manufacturing process. The utility model can effectively eliminate the harmonic peak frequency point which is on the inherent work amplitude frequency curve of the moving-coil loud-speaker; the work frequency curve can tend to be flat, and thus, sound transmission quality and sound playing quality of the loud-speaker can be improved, distortion of the loud-speaker can be reduced.

Description

Be connected to the loud speaker (loudspeaker) of trapper

A kind of loud speaker that is connected to trapper relates to the improvement to loud speaker.

Common loud speaker all is made up of magnet steel, voice coil loudspeaker voice coil, cone, spring, by the signal of telecommunication that external circuit is sent here, drives the diffuser vibration sound takes place.Because the material material difference of parts such as the magnet steel of these loud speakers, voice coil loudspeaker voice coil, cone, the concrete structure of loudspeaker is different, each loud speaker all can produce a mechanical frequency humorous peak dot that resonates on its quiescent operation amplitude frequency curve, that have even have a plurality of, and the amplitude height does not wait, as shown in Figure 1, make the work amplitude frequency curve of loud speaker level and smooth inadequately.Like this,, all can cause the phenomenon of loudspeaker distortion, particularly on the frequency that the humorous peak dot of resonance is arranged, very easily produce whistle when loud speaker is used for audio-amplifying circuit.Because the appearance at these humorous peaks that resonate, the mechanical-physical factor that is loudspeaker causes, for many years, people attempt to go to take measures from the angle of mechanical technology, as choose and hang down resistive material, change the mechanical attachment mode of above-mentioned four kinds of elements or on cone, coat organic coating, to reduce the sensitivity of cone ... or the like, but, because the vibration sensitivity of cone and the humorous peak of resonance of loudspeaker are two aspects of a pair of contradiction, when highly sensitive, carton voice effect height can transmit original various frequency losslessly, only can produce whistle on specific humorous peak frequency, and adopt the cone of muting sensitivity as people, on specific humorous peak frequency, may not can produce whistle, but make loudspeaker fall for due off beat in many sources of sound frequently " filter ", cause the distortion factor of loudspeaker to improve, that is to say to reduce the sensitivity of loud speaker, definition is a cost, solves the whistle distortion of loud speaker.

The purpose of this utility model, be to provide a kind of loud speaker that is connected to trapper, on the basis of the material that does not change loudspeaker, structure, eliminate the humorous peak on the loudspeaker quiescent operation amplitude frequency curve, make the characteristic working curve of loudspeaker smooth-out, can keep the original sounding sensitivity of loud speaker, can on specific humorous peak frequency, can not produce again and utter long and high-pitched sounds, improve the quality that loudspeaker are replayed and amplified.

The utility model is to implement like this: the said loud speaker of the utility model, be in the loudspeaker of forming by magnet steel 1, voice coil loudspeaker voice coil 2, cone 3, spring 4, series connection inserts a passive two-terminal network element trapper 5 and forms on the input lead a of loudspeaker or b, wherein, said trapper 5 also can be to compose in parallel a resonant tank by discrete component inductance L, resistance R, capacitor C to insert.

Below, structure of the present utility model and principle are described in detail in detail in conjunction with the accompanying drawings.

Fig. 1 is the quiescent operation amplitude frequency curve schematic diagram of existing loud speaker;

Fig. 2 is the loadspeaker structure schematic diagram of band trapper described in the utility model;

Fig. 3 adopts discrete component to make the connection diagram of trapper resonant tank and loud speaker;

Fig. 4 is the loudspeaker wiring schematic diagram that adopts a plurality of trappers.

Shown in the solid line among Fig. 1, now commercially available loud speaker (loudspeaker) is because factors such as the material of product, structures, on its operating frequency curve, can have the humorous peak of more than one resonance frequency unavoidablely, and its amplitude different to have height to have low with the material of loud speaker, structure.Because these humorous peak frequency f1, f2 ... existence, though the sensitivity that some good loudspeaker amplify is higher,, cause the distortion that amplifies of loud speaker if input signal very easily produces whistle again when the power of this frequency is big slightly, influenced the effect that amplifies.

In order fundamentally to solve above-mentioned contradiction, the utility model has adopted frame mode as shown in Figure 2, on the end lead-in wire A of the loud speaker input of forming by magnet steel 1, voice coil loudspeaker voice coil 2, carton 3, spring 4, series connection inserts a passive two-terminal network device trapper 5 and forms, in the practical application, can receive the loud speaker of band trapper on the frequency divider (, directly being linked into the output of sound amplifier) of audio amplifier if there is not frequency dividing circuit.Because the said trapper 5 of the utility model can be by the discrete component inductance L, resistance R, capacitor C composes in parallel a resonant tank, as shown in Figure 3, these elements itself are passive devices, in actual use, these three element connected in series are connected between frequency divider 6 and the loud speaker, simultaneously R, L, C is transferred to it and is transferred to its resonance frequency on the humorous peak frequency in the operating frequency curve of the loud speaker that connects, making the trapper impedance loop is maximum, once audio signal of sound amplifier output is when occurring on humorous peak frequency, the existence of trapper has suppressed the energy on this frequency, thereby make the operating frequency curve of loud speaker smooth-out, working curve as shown in phantom in Figure 1 occurs, guarantee the lossless output reduction of sound.In concrete the connection, both can be and be serially connected in an end of loud speaker after being unified into resonant tank discrete component inductance L, capacitor C, resistance R, as shown in Figure 3; Again on the binding post A or B that can directly be fixedly connected the passive two-terminal network device trapper 5 after solidifying at loud speaker, as shown in Figure 2.

Because the front is mentioned, in view of different materials, different structures are made, different loud speakers just has different quiescent operation amplitude frequency curves and can have different humorous peak frequency such as f ₁, f ₂Therefore, in actual production, can also be as shown in Figure 5, a plurality of trappers 5 of different frequent points are serially connected in an end of loud speaker simultaneously or are connected on the two ends of loud speaker respectively, so that allow these trappers respectively the humorous peak of each frequency be curbed, improve the work quality of loud speaker, improve the quality of speaker playback sound.

Adopted loud speaker as the said structure of the utility model, the cost cost is low, technology is simple, both can be connected in the loud speaker loop, can be bonded together with the binding post of loud speaker again, thereby improve the quiescent operation amplitude-versus-frequency curve of loud speaker, reduce the distortion factor of loud speaker, improve the tonequality of broadcasting of loud speaker.

Claims (3)

1, a kind of loud speaker that is connected to trapper, it is characterized in that on an end output line A of the loud speaker of forming by magnet steel (1), voice coil loudspeaker voice coil (2), cone (3), spring (4), series connection is connected to a passive two-terminal network device trapper (5) to be formed, and wherein trapper (5) is to be made by inductance L, resistance R, the in parallel curing of capacitor C.

2,, it is characterized in that the trap-wave loop that the said trapper (5) that is connected on the loud speaker one end output line A can directly be composed in parallel by discrete component inductance L, resistance R, capacitor C replaces according to the said loud speaker that is connected to trapper of claim 1.

3,, it is characterized in that and to be connected on the different a plurality of trappers (5) of frequency respectively on two output terminals A, B of loud speaker according to claim 1 or the 2 said loud speakers that are connected to trapper.

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