RU2792582C1 - Speaker system device - Google Patents

Abstract

FIELD: acoustics.

SUBSTANCE: speaker filter comprises a low-low pass filter, a high-low pass filter, a mid-pass filter, and a high pass filter. The first input is connected to the output of the speaker of the low-low frequency range, the first output of the first coil, the first output of the second coil, the first output of the midrange speaker, the first outputs of the first and second capacitors, the second input is connected to the second outputs of the third and fourth coils, the second output of the speaker low-frequency range, the second output of the third and fourth capacitors and the second output of the tweeter. The second output of the low-frequency range speaker is connected to the first output of the third and fourth coils, the first output of the high-low frequency range speaker is connected to the second output of the first and second coils, the second output of the midrange speaker is connected to the first outputs of the third and fourth capacitors, the first output of the high-frequency speaker range is connected to the second terminals of the first and second capacitors. The inductance values of the first and second coils are equal, the inductance values of the third and fourth coils are equal, the capacitance of the first capacitor is equal to the capacitance of the second capacitor, and the capacitance of the third capacitor is equal to the capacitance of the fourth capacitor.

EFFECT: increased linearity of the phase-frequency characteristic.

1 cl, 1 dwg

Description

The invention relates to radio engineering and can be used in acoustic systems of household or professional sound reproducing equipment.

A four-band device for an acoustic system is known, containing a low-pass LC filter, a mid-pass LC filter and two parallel high-pass LC filters, the outputs of which are designed to connect dynamic heads of a low-frequency, mid-frequency and two high-frequency ranges (see international application WO 81/00947, cl. H04R 3/12, published 04/02/1981, Fig. 3).

This device has a simple design, but does not provide the required sound quality in the low-frequency range, due to the fact that it does not provide signal separation at low frequencies during playback, which leads to blurring of the localization of apparent sound sources.

Closest to the invention in terms of technical essence and achieved technical result is a filter for an acoustic system, containing a low-low frequency filter, a high-low frequency filter, a mid-frequency filter and a high-frequency filter, the outputs of which are intended for connecting dynamic heads, respectively, low-low frequency, upper-low frequency, mid-frequency and high-frequency ranges (see US patent No. 10701487, class H04R 3/04, publ. 06/10/2020, Fig. 5).

This device allows you to improve the fidelity of sound reproduction, the stability of technical characteristics and provides a more even distribution of loads on each dynamic head. However, it has a complex design with the need to use a large number of capacitors and inductors, but it does not provide the necessary linearity of the phase-frequency response.

The technical problem to be solved by the present invention is to overcome the above disadvantages.

The technical result consists in the fact that an increase in the linearity of the phase-frequency characteristic of the device is achieved while maintaining the uniformity of its amplitude-frequency characteristic and simplifying the design.

The specified technical problem is solved, and the technical result is achieved due to the fact that the Filter for the acoustic system contains a low-low-pass filter, a high-low-pass filter, a mid-pass filter and a high-pass filter, the outputs of which are designed to connect dynamic heads, respectively, low-low-frequency, upper - low-frequency, mid-frequency and high-frequency ranges, while the first input of the device is connected to the first output of the dynamic head of the low-low frequency range, the first output of the first inductor, the first output of the second inductor, the first output of the dynamic head of the mid-frequency range, the first output of the first capacitor and the first output the second capacitor, the second input of the device is connected to the second terminal of the third inductor, the second terminal of the fourth inductor, the second terminal of the dynamic head of the upper low frequency range, the second terminal of the third capacitor, to the second terminal of the fourth capacitor and the second terminal of the high-frequency range dynamic head, wherein the second terminal of the low-frequency range dynamic head is connected to the first terminal of the third inductor and the first terminal of the fourth inductor, the first terminal of the high-low frequency range dynamic head is connected to the second terminal of the first inductor and the second terminal of the second inductor, the second terminal of the midrange dynamic head is connected to the first terminal of the third capacitor and the first terminal of the fourth capacitor, the first terminal of the high frequency dynamic head is connected to the second terminal of the first capacitor and the second terminal of the second capacitor, while the inductance value (L1) of the first inductor is equal to the inductance (L2) of the second inductor, the inductance (L3) of the third inductor is equal to the inductance (L4) of the fourth inductor In fact, the capacitance (C1) of the first capacitor is equal to the capacitance C2) of the second capacitor, and the capacitance (C3) of the third capacitor is equal to the capacitance (C4) of the fourth capacitor.

Thus, the device includes four parallel circuits, namely two inductive ones, which form low-pass and high-pass filters, and two capacitive ones, which form mid-range and high-frequency filters, which are harmonized with each other in terms of parameters and directivity, and the dynamic low-frequency and high-frequency heads do not have common coils inductance, and the dynamic heads of the HF and MF do not have common feed-through capacitors .;

The above, in combination with the fact that the device has a parallel structure, and the inductors and capacitors installed in parallel have, respectively, the same inductance and capacitance, increases the return on the range and the consistency of the operation of the dynamic low-frequency and high-frequency heads, as well as the dynamic mid-range and high-frequency heads.

This solution allows you to expand the frequency range (AFC) of the system and achieve phase consistency (PFC).

Thus, the signal is filtered to the dynamic head of the high-frequency range (HF) by the first and second capacitors, to the dynamic head of the mid-frequency range (MF) the signal is filtered by the third and fourth capacitors, and to the dynamic head of the high-low frequency range (VLF) the signal is filtered by the first and second coils inductance and on the dynamic head of the lower-low-frequency range (LLF)) the signal is filtered out by the third and fourth inductors.

As a result, the bass and treble dynamic heads create an overall reproduction harmony (quality) throughout the low frequency range, and the midrange and treble dynamic drivers create an overall reproduction harmony (quality) throughout the mid and high frequency range.

As a result, an increase in the linearity of the phase-frequency characteristic of the device is achieved while maintaining the uniformity of its amplitude-frequency characteristic, providing the required separation (AFC) and matching (PFC) of dynamic heads.

Thus, the device is universal for any acoustic systems (car, household, concert and similar acoustic systems).

The drawing shows a schematic diagram of the device.

The filter for the acoustic system contains a low-low-pass filter, a high-low-pass filter, a mid-pass filter and a high-pass filter, the outputs of which are designed to connect dynamic heads 1, 2, 3 and 4, respectively, low-low-frequency, upper-low-frequency, mid-frequency and high-frequency ranges .

The first input 5 of the device is connected to the first output of the dynamic low-frequency range head 1, the first output of the first inductor 6, the first output of the second inductor 7, the first output of the midrange dynamic head 3, the first output of the first capacitor 8 and the first output of the second capacitor 9.

The second input 10 of the device is connected to the second output of the third inductor 11, the second output - the fourth inductor 12, the second output of the dynamic head of the upper-low frequency range 2, the second output of the third capacitor 13, the second output of the fourth capacitor 14 and the second output of the dynamic head of the high-frequency range 4.

The second output of the dynamic head of the low-low frequency range 1 is connected to the first output of the third inductor 11 and the first output of the fourth inductor 12.

The first output of the dynamic head of the upper-low frequency range 2 is connected to the second output of the first inductor 6 and the second output of the second inductor 7.

The second output of the dynamic head of the midrange 3 is connected to the first output of the third capacitor 13 and the first output of the fourth capacitor 14.

The first output of the dynamic head of the high-frequency range 4 is connected to the second output of the first capacitor 8 and the second output of the second capacitor 9.

The value of the inductance of the first inductor 6 is equal to the value of the inductance of the second inductor 7, the value of the inductance of the third inductor 11 is equal to the value of the inductance of the fourth inductor 12, the capacitance of the first capacitor 8 is equal to the capacitance of the second capacitor 9, and the capacitance of the third capacitor 13 is equal to the capacitance of the fourth capacitor 14.

In this device, the low-low-pass filter is represented by the third inductor 11 and the fourth inductor 12, designed for the dynamic low-low frequency head 1, which extracts signals with frequencies below 200 Hz, i.e. for the lower part of the low-frequency range, and signals with a frequency below 200 Hz are not reproduced by the dynamic head 1 LLF.

Signals with frequencies above 200 Hz, as described above, are not passed by this filter formed by the third 11 and fourth 12 inductors, and the upper-low-pass filter formed by the first inductor 6 and the second inductor 7 does not pass signals below 200 Hz.

The high-pass filter formed by the first 8 and second 9 capacitors is designed for the dynamic head of the high-frequency range 4, selects signals with frequencies above 5-6 kHz, for which the high-frequency signal passes through the first capacitor 8 and the second capacitor 9 and the dynamic head of the high-frequency range 4. Signals with frequencies below 5-6 kHz are not passed by this filter.

The mid-range signals are passed through the mid-range filter formed by the third 13 and fourth 14 capacitors and are reproduced by the dynamic mid-range head 3.

Thus, the midrange driver 3 receives a signal that corresponds only to the midrange.

As a result, the linearity of the phase-frequency characteristic of the device, while maintaining the uniformity of its amplitude-frequency response, makes it possible to improve the quality of the stereo effect, reduce the inaccuracy in the perception of the position of sound sources and reduce distortion when playing various sounds, which as a result improves the quality of reproduction of various kinds of sounds.

Claims (1)

A filter for an acoustic system, containing a low-low-frequency filter, a high-low-pass filter, a mid-pass filter and a high-pass filter, the outputs of which are intended for connecting dynamic heads, respectively, of the low-low frequency, upper-low-frequency, mid-frequency and high-frequency ranges, characterized in that the first input of the device connected to the first terminal of the low-low frequency range driver, the first terminal of the first inductor, the first terminal of the second inductor, the first terminal of the midrange dynamic driver, the first terminal of the first capacitor and the first terminal of the second capacitor, the second input of the device is connected to the second terminal of the third inductor , the second terminal of the fourth inductor, the second terminal of the high-low range dynamic head, the second terminal of the third capacitor, the second terminal of the fourth capacitor, and the second terminal of the dynamic head high-frequency range, and the second output of the dynamic head of the low-low frequency range is connected to the first output of the third inductor and the first output of the fourth inductor, the first output of the dynamic head of the upper-low frequency range is connected to the second output of the first inductor and the second output of the second inductor, the second output of the dynamic head of the mid-range range is connected to the first terminal of the third capacitor and the first terminal of the fourth capacitor, the first terminal of the dynamic head of the high-frequency range is connected to the second terminal of the first capacitor and the second terminal of the second capacitor, while the value of the inductance of the first inductor is equal to the value of the inductance of the second inductor, the value of the inductance of the third inductor is equal to the value of the inductance of the fourth inductor, the capacitance of the first capacitor is equal to the capacitance of the second capacitor, and the capacitance of the third con condenser is equal to the capacitance of the fourth capacitor.

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