CN204948328U

CN204948328U - Unit three move iron earphone frequency dividing circuit

Info

Publication number: CN204948328U
Application number: CN201520651003.1U
Authority: CN
Inventors: 孙虎
Original assignee: Chengdu Excellent Industrial Design Co Ltd
Current assignee: Chengdu Excellent Industrial Design Co Ltd
Priority date: 2015-08-26
Filing date: 2015-08-26
Publication date: 2016-01-06
Anticipated expiration: 2025-08-26

Abstract

This reality relates to dynamic iron head circuit field, the utility model discloses Unit three and moves iron earphone frequency dividing circuit, and mainly solving existing Unit three, to move in iron head circuit the fluctuation of bass response curve large, the problem that sound is more noisy.In the technical solution of the utility model, signal input unit is connected with three frequency division circuit by the first electric capacity, in three frequency division circuit, each dynamic iron unit is connected with resistance capacitance, scaling down processing is carried out to high frequency and medium and low frequency, high frequency is used to move iron cell processing high pitched signal, first medium and low frequency moves iron unit and the second medium and low frequency moves iron cell processing medium and low frequency signal, each dynamic iron unit sender is connected with corresponding sound guide tube, by the damping filter screen Balanced Audio attenuation arranged in sound guide tube, the utility model has the fluctuation of middle bass to be reduced, high pitch fluctuation slows down, frequency response curve is close to straight line, the more perfect feature of tonequality, greatly improve the performance that Unit three move the process of iron headphones sound.

Description

Unit three move iron earphone frequency dividing circuit

Technical field

The utility model relates to dynamic iron head circuit field, is that Unit three move iron earphone frequency dividing circuit concretely.

Background technology

That pursues sound aesthetic feeling along with people improves constantly, the dynamic iron earphone with advantages such as soundproof effect are good, highly sensitive, frequency response curve is more stable, volume is slimmer and more graceful is widely used, the operation principle of dynamic iron earphone is that voice coil loudspeaker voice coil is called as on the accurate iron plate of " balanced armature " around the central authorities that is positioned at permanent magnetic field, and this block iron plate drives vibrating diaphragm sounding under the effect of magnetic force.The dynamic iron unit that dynamic iron earphone has is more, and the separation of music is better.But existing domestic and international market multiple unit moves the design that iron earphone major part adopts the non-frequency division of single conduit, advantage is that structure is simple, and shortcoming is that high bass does not process separately in the process of sound, and sound is more noisy, and in frequency response curve, bass part fluctuation is larger.

Utility model content

Technical problem to be solved in the utility model, iron head circuit is moved exactly for prior art three unit, high bass does not carry out scaling down processing, middle bass response curve fluctuation is large, and the shortcomings such as sound is more noisy, provide a kind of Unit three to move iron earphone frequency dividing circuit, connect different resistance capacitances respectively by dynamic iron unit to process high bass, the sound of different frequency is by the sound guide tube of corresponding damping coefficient simultaneously, makes frequency response curve close to straight line, thus obtains more perfect tonequality.

The utility model solves the problems of the technologies described above, and the technical scheme of employing is, Unit three move iron earphone frequency dividing circuit, and signal input unit is connected with three frequency division circuit by the first electric capacity; First route resistance of described three frequency division circuit and the first medium and low frequency move iron units in series and form, and described first medium and low frequency moves iron unit sender and is connected with medium and low frequency sound guide tube; Second route No. two resistance of described three frequency division circuit, No. three resistance and the second medium and low frequency move iron units in series and form, and described second medium and low frequency moves iron unit sender and is connected with medium and low frequency sound guide tube; 3rd route second electric capacity of described three frequency division circuit and high frequency move iron units in series and form, and described high frequency moves iron unit sender and is connected with high frequency sound guide tube; Be provided with the first damping filter screen in described medium and low frequency sound guide tube, in high frequency sound guide tube, be provided with the second damping filter screen.The advantage of this structure is by three frequency dividing circuits corresponding with the sound of three frequencies, reaches the effect of scaling down processing, and the sound of different frequency enters different sound guide tube after dynamic iron cell processing simultaneously, strengthens sound localization effect, improves sound resolution

Further, resistance is 1.2 Ω, No. two resistance is 10 Ω, No. three resistance is 22 Ω, the second electric capacity is 1.500 μ F.

Further, the damping coefficient of the first damping filter screen is greater than the damping coefficient of the second damping filter screen.

The beneficial effects of the utility model are, connect different resistance capacitances respectively by dynamic iron unit to process high bass, the sound of different frequency passes through the sound guide tube of corresponding damping coefficient simultaneously, make frequency response curve close to straight line, thus obtain more perfect tonequality, greatly improve the performance that Unit three move the process of iron headphones sound.

Below in conjunction with accompanying drawing, the utility model is further illustrated, realize the utility model to enable those skilled in the art.

Accompanying drawing explanation

Fig. 1 is that Unit three move iron earphone frequency dividing circuit structural representation;

Fig. 2 is that prior art three unit moves iron earphone frequency response curve analogous diagram;

Fig. 3 is that Unit three of embodiment move iron earphone frequency dividing circuit frequency response curve analogous diagram;

Embodiment

As shown in Figure 1, Unit three move iron earphone frequency dividing circuit, and signal input unit 1 is connected with three frequency division circuit by the first electric capacity 201; It is in series that first route resistance 301 of described three frequency division circuit and the first medium and low frequency move iron unit 401, and described first medium and low frequency moves iron unit 401 sender and is connected with medium and low frequency sound guide tube 5; It is in series that second route No. two resistance, 302, No. three resistance 303 of described three frequency division circuit and the second medium and low frequency move iron unit 402, described second medium and low frequency moves iron unit 402 sender and is connected described three frequency division circuit with medium and low frequency sound guide tube 5, it is in series that 3rd route second electric capacity 202 of described three frequency division circuit and high frequency move iron unit 403, and described high frequency moves iron unit 403 sender and is connected with high frequency sound guide tube 7; Be provided with the first damping filter screen 601 in described medium and low frequency sound guide tube 5, in high frequency sound guide tube 7, be provided with the second damping filter screen 602.Resistance 301 is 1.2 Ω, No. two resistance 302 is 10 Ω, No. three resistance 303 is 22 Ω, the second electric capacity 202 is 1.500 μ F.The damping coefficient of the first damping filter screen 601 is greater than the damping coefficient of the second damping filter screen 602.

As shown in Figures 2 and 3, under identical transmission conditions, prior art analogous diagram, overall frequency response curve is mountain peak shape, and middle high, both sides are low.Explanation alt is better, bass, middle bass, high pitch, and ultrahigh frequency is weak, and sense of hearing voice is forward, and rearward, string class height music device will more leans back, and lower to on-the-spot reduction degree, sound is not three-dimensional, as Fig. 2 for the alts such as percussion instrument.Embodiment analogous diagram, frequency response curve is substantially close to straight line, and subwoofer, alt, there is-2DB at high pitch 4000HZ-5000HZ place respectively, and-2DB ,-4DB acoustic pressure declines, but falls seldom, and people's ear is difficult to discover, but has abrupt slope after 8500HZ, and high sound is more weak.Sense of hearing aspect, totally comparatively balanced, bass or percussion instrument strong, amount sense foot, alt is more weak, and voice is slightly by rear, but not obvious, and high pitch is brighter, and this extremely difficult frequency discovered of high sound is more weak, totally balanced, than good a lot of before non-tuning, as Fig. 3.

During use, audio signal is transported to the first electric capacity 201 by signal input unit 1, three frequency division circuit is entered respectively after cutting off direct current process, wherein enter before high frequency moves iron unit 403 and by the second electric capacity 202, medium and low frequency signal is filtered, then move iron unit 403 sender by high frequency and be input to high frequency sound guide tube 7, export after falling acoustic pressure process finally by damping filter screen 602.Signal enters a resistance 301 by 1.2 Ω before medium and low frequency moves iron unit 401, and another enters No. three resistance 303 by No. two resistance 302 and 22 Ω of 10 Ω before medium and low frequency moves iron unit 402.Eventually pass two medium and low frequencies move iron cell processing after signal converge to medium and low frequency sound guide tube 5 by sender, then to export after falling acoustic pressure process by damping filter screen 601.

Claims

1. Unit three move iron earphone frequency dividing circuit, it is characterized in that: signal input unit (1) is connected with three frequency division circuit by the first electric capacity (201); It is in series that first route resistance (301) of described three frequency division circuit and the first medium and low frequency move iron unit (401), and described first medium and low frequency moves iron unit (401) sender and is connected with medium and low frequency sound guide tube (5); It is in series that second route No. two resistance (302) of described three frequency division circuit, No. three resistance (303) and the second medium and low frequency move iron unit (402), and described second medium and low frequency moves iron unit (402) sender and is connected with medium and low frequency sound guide tube (5); It is in series that 3rd route second electric capacity (202) of described three frequency division circuit and high frequency move iron unit (403), and described high frequency moves iron unit (403) sender and is connected with high frequency sound guide tube (7); Be provided with the first damping filter screen (601) in described medium and low frequency sound guide tube (5), in high frequency sound guide tube (7), be provided with the second damping filter screen (602).

2. Unit three according to claim 1 move iron earphone frequency dividing circuit, it is characterized in that: a described resistance (301) is 1.2 Ω, No. two resistance (302) are 10 Ω, No. three resistance (303) are 22 Ω, the second electric capacity (202) is 1.500 μ F.

3. move iron earphone frequency dividing circuit according to the Unit three one of claim 1 to 2 Suo Shu, it is characterized in that: the damping coefficient of described first damping filter screen (601) is greater than the damping coefficient of the second damping filter screen (602).