CN214756877U

CN214756877U - High-fidelity sound box frequency divider with frequency dividing point of 10kHz

Info

Publication number: CN214756877U
Application number: CN202120669746.7U
Authority: CN
Inventors: 刘博宇; 陈忠伟; 崔文琦; 胡倩; 马苗苗; 安光倩
Original assignee: HUBEI UNIVERSITY OF ECONOMICS
Current assignee: HUBEI UNIVERSITY OF ECONOMICS
Priority date: 2021-04-01
Filing date: 2021-04-01
Publication date: 2021-11-16
Anticipated expiration: 2031-04-01

Abstract

The utility model discloses a divide frequency point at high-fidelity audio amplifier frequency divider of 10kHz, this frequency divider signal input end is anodal, inductance L1, woofer, signal input end negative pole is series connection in proper order, the signal input end is anodal, electric capacity C2, electric capacity C3, resistance R2, tweeter, signal input end negative pole is series connection in proper order, inductance L2 one end is connected between electric capacity C2 and electric capacity C3, the other end is connected with the signal input end negative pole, electric capacity C4, resistance R2 connects after the parallel connection one end is connected between electric capacity C3 and resistance R1, the other end is connected with the signal input end negative pole. Current flows through an inductor L1, the high frequency part is prevented, signals below 10Khz enter a woofer for playback, and a woofer parallel capacitor C1 can generate a voltage to compensate the lost voltage at high frequency; meanwhile, current flows through a capacitor C2, low-frequency signals are prevented, voltage is compensated by a shunt inductor L2, and the signals above 10Khz enter a high-pitch loudspeaker for playback through resistors R1 and R2, a capacitor C2, a capacitor C3 and a capacitor C4.

Description

High-fidelity sound box frequency divider with frequency dividing point of 10kHz

Technical Field

The application relates to a divide-by-two acoustic frequency divider.

Background

The frequency range of sound is between 20Hz and 20kHz, which is difficult to achieve by only using one speaker to emit sound of such a wide frequency. In order to reproduce the frequency response and the bandwidth of sound, a high-quality sound reproduction system necessarily uses a frequency divider, and sound signals of different frequency bands are distinguished by fully utilizing the characteristics of a capacitor and a coil, are respectively amplified and then are sent to speakers of corresponding frequency bands for reproduction, so that the cooperative work of multiple speakers is realized.

The high and low frequency dividing points of the traditional double-loudspeaker system are about 2k-5k, and because the overtones of human voice and musical instruments extend to high frequency to a large extent and can reach 9.8KHZ at most, the situation that fundamental tones and overtones emitted by unified sound sources are respectively emitted from different loudspeakers is inevitably caused, so that the phase distortion is inevitably brought, the distortion of a sound field and the deformation of sound are caused, and the accurate transmission of the high fidelity of music is influenced. Therefore, to completely avoid such phase distortion, it is necessary to design a frequency divider with a division point of 10 Khz.

SUMMERY OF THE UTILITY MODEL

The application provides a divide-by-two acoustic frequency divider with a frequency dividing point of 10 kHz.

According to an aspect of the embodiments of the present application, there is provided a sound box frequency divider, including a signal input terminal anode, a signal input terminal cathode, a woofer, a tweeter, and a frequency dividing circuit for dividing an input audio signal to enable signals below 10Khz to enter the woofer playback, and signals above 10Khz to enter the tweeter playback, the frequency dividing circuit including:

an inductor L1, an inductor L2, a capacitor C1, a capacitor C2, a capacitor C3, a capacitor C4, a resistor R1 and a resistor R2, wherein the positive pole of the signal input end, the inductor L1, the woofer and the negative pole of the signal input end are sequentially connected in series, the positive pole of the signal input end, the capacitor C2, the capacitor C3, the resistor R2, the tweeter and the negative pole of the signal input end are sequentially connected in series, one end of the inductor L2 is connected between the capacitor C2 and the capacitor C3, the other end of the inductor L2 is connected with the negative pole of the signal input end, one end of the parallel connected capacitor C4 and the parallel connected resistor R2 is connected between the capacitor C3 and the resistor R1, and the other end of the parallel connected with the negative pole of the signal input end; or

An inductor L1 ', an inductor L2', a capacitor C1 ', a capacitor C2', a capacitor C3 ', a resistor R1', a resistor R2 ', a resistor R3', the positive electrode of the input end, the inductor L1', the woofer and the negative electrode of the signal input end are connected in series in sequence, the resistor R1 ' and the capacitor C1 ' are connected in series and then connected in parallel at two ends of the woofer, the anode of the signal input end, the capacitor C2 ', the capacitor C3 ', the resistor R2 ', the tweeter and the cathode of the signal input end are sequentially connected in series, one end of the inductor L2 'is connected between the capacitor C2' and the capacitor C3 ', the other end of the inductor L2' is connected with the negative pole of the signal input end, one end of the resistor R3 'is connected between the capacitor C3' and the resistor R2 ', and the other end of the resistor R3' is connected with the negative pole of the signal input end.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings of the embodiments will be briefly described below.

Fig. 1 shows a hi-fi enclosure divider circuit topology with a division point at 10kHz according to an embodiment of the present application.

Fig. 2 shows a hi-fi enclosure divider circuit topology with a division point at 10kHz according to another embodiment of the present application.

Detailed Description

FIG. 1 shows a high fidelity sound box frequency divider circuit topology with a frequency dividing point of 10kHz, wherein a signal input end anode, an inductor L1, a woofer and a signal input end cathode of the frequency divider are sequentially connected in series; the signal input end anode, electric capacity C2, electric capacity C3, resistance R1, tweeter, signal input end cathode are series connection in proper order, and inductance L2 one end is connected between electric capacity C2 and electric capacity C3, and the inductance L2 other end is connected with the signal input end cathode, and electric capacity C4, resistance R2 one end after connecting in parallel is connected between electric capacity C3 and resistance R1, and the other end is connected with the signal input end cathode. The inductance L1 may be 1.2mH, the inductance L2 may be may be 0.5mH, the capacitances C1, C2, C3, and C4 may be 15uf, 2.0uf, 10uf, and 1.5uf, respectively, and the resistances R1 and R2 may be 4 Ω and 10 Ω, respectively.

For low-frequency signals, current flows through an inductor L1 firstly, so that high-frequency parts are prevented, low-frequency parts pass smoothly due to the fact that coils have no blocking effect basically, meanwhile, a capacitor C1 is connected in parallel with the woofer, and voltage generated by the woofer in high-frequency is used for compensating lost voltage, so that high-cut low-pass of input signals is achieved, and signals below 10Khz enter the woofer to be played back. Meanwhile, aiming at high-frequency signals, current flows through the capacitor C2 firstly, so that low-frequency signals are prevented, the inductor L2 is connected in parallel to compensate voltage, meanwhile, the input signals are tuned through the resistors R1 and R2, the capacitors C2, C3 and C4, and finally low-cut high-pass is achieved for the input signals, and signals above 10Khz enter the high-pitch loudspeaker for playback.

FIG. 2 shows another Hi-Fi sound box frequency divider circuit topology with frequency dividing point at 10kHz, the positive pole of the signal input end of the frequency divider, an inductor L1 ', a woofer and the negative pole of the signal input end are sequentially connected in series, and a resistor R1 ' and a capacitor C1 ' which are connected in series are connected in parallel at two ends of the woofer; the positive electrode of the signal input end, the capacitor C2 ', the capacitor C3 ', the resistor R2 ', the tweeter and the negative electrode of the signal input end are sequentially connected in series; one end of an inductor L2 'is connected between the capacitor C2' and the capacitor C3 ', and the other end of the inductor L2' is connected with the negative electrode of the signal input end; one end of the resistor R3 ' is connected between the capacitor C3 ' and the resistor R2 ', and the other end is connected with the negative pole of the signal input end. The inductance L1 'may be 0.8mH, the inductance L2' may be 0.4mH, the capacitances C1 ', C2', and C3 'may be 10uf, 1.5uf, and 10uf, respectively, and the resistances R1', R2 ', and R3' may be 8 Ω, 4 Ω, and 10 Ω, respectively.

For low-frequency signals, current flows through an inductor L1 'firstly, so that the high-frequency part is prevented, the low-frequency part passes smoothly due to the fact that a coil has no blocking effect basically, and meanwhile, a capacitor C1' is connected in parallel with the woofer and used for generating voltage to compensate lost voltage during high-frequency, so that high-cut low-pass of input signals is achieved, and signals below 10Khz enter the woofer to be played back. Meanwhile, aiming at high-frequency signals, current flows through a capacitor C2 ' firstly, so that low-frequency signals are prevented, the inductor L2 ' is connected in parallel to compensate voltage, meanwhile, the resistors R1 ', R2 ', capacitors C2 ', C3 ' and C4 ' are used for tuning, finally, low-cut high-pass is achieved for input signals, and signals above 10Khz enter a high-pitch loudspeaker for playback.

Claims

1. The utility model provides a sound box frequency divider, its characterized in that includes signal input end positive pole, signal input end negative pole, woofer, tweeter to and carry out the frequency division to the audio signal of input and make the following signal of 10Khz get into the woofer playback, the signal entering more than 10Khz the frequency division circuit of tweeter playback, this frequency division circuit includes:

2. The loudspeaker box frequency divider according to claim 1, wherein the inductance L1 is 1.2mH, the inductance L2 is 0.5mH, the capacitances C1, C2, C3 and C4 are 15uf, 2.0uf, 10uf and 1.5uf respectively, and the resistances R1 and R2 are 4 Ω and 10 Ω respectively.

3. The loudspeaker box frequency divider according to claim 1, wherein the inductance L1 'may be 0.8mH, the inductance L2' may be 0.4mH, the capacitances C1 ', C2', C3 'are 10uf, 1.5uf, 10uf, respectively, and the resistances R1', R2 ', R3' are 8 Ω, 4 Ω, 10 Ω, respectively.