TW494701B - Differential type inverse-phase noise control system - Google Patents

Abstract

The present invention relates to a kind of differential type inverse-phase noise control system, and particular relates to a control system that can accurately control the anti-control point of noise. In the control system, the speaker is mainly designed to have a dual voice-coil structure, by incorporation of the electronic circuit having multi-angle phase variations, the interaction in between these two voice coils with phase difference is directly controlled by using the electronic circuit. In addition, by matching the operations of switch and variable resistor, the purpose of changing phase of output sound wave for the speaker is then obtained. Moreover, it is capable of performing an omnidirectional phase adjustment so as to thoroughly solve the deviation phenomenon between the circuit and the speaker. Further more, the accuracy of inverse sound-wave phase is assured to effectively solve noise environmental pollution. Thus, the invention is a creation having extreme effects.

Description

A7 A7 Printed by the Consumer Cooperative of the Central Standards Bureau of the Ministry of Economic Affairs 5. Description of the Invention (〇1) The invention belongs to a technical means to solve the noise problem by using inverse technology, which consists of a phase amplifier circuit and a phase-shift amplifier circuit. The electronic circuit, combined with the special design of the dual voice coil of the speaker, effectively controls the phase of the inverse sound wave of the noise to achieve the purpose of suppressing the noise. According to the progress of the industrial and commercial society, although various technological products have brought a lot of convenience to people, they have also caused a lot of damage to our surrounding environment, such as air pollution, noise pollution, etc. Ear water is directly transmitted to the crotch of a person, making it impossible for people to concentrate. Therefore, how to eliminate the harm of noise to the human body and improve the comfort of the home or work environment is a major issue of current environmental protection work. Existing voice prevention equipment can be described as all-encompassing, but in terms of treatment methods, most of them are passive prevention measures. For example, there are active treatment methods to reduce the noise figure by strengthening the product structure against noise sources or using shock-absorbing equipment. There are also passive processing methods such as installing sound insulation boards and sound absorbing materials in local spaces to isolate external interference, but these processings cannot effectively prevent the occurrence of voices. The noise involved includes sound waves and ultrasound waves in a broad sense. Because humans cannot directly sense ultrasound waves, and sound waves directly affect human hearing organs. Therefore, the so-called voice refers to the general discomfort or interference. The sound waves of human activities, because most of the noise is transmitted in three-dimensional space of points, lines, and surfaces in the form of sound waves. Therefore, the most effective way to prevent noise is to eliminate it when it is first generated, to prevent it. It spreads in the air. Recently, the theory that "inverted sound waves can cancel normal phase sound waves" has been confirmed. 83. 3.1〇, 〇〇〇 1T ------ (Please read the precautions on the back before filling this page) 494701

Description of the invention ()

The inventor has completed a number of patents based on this theory, such as the Republic of China No. 109936, the Japanese New Model No. 3002891, the Chinese Mainland Utility Model No. ZL9522G151 · 5 胄, the British Invention No. 1163 · Q, and the German New Model No. 29515582.5 No. and French new type No. 9600621 and other noises are both a sound wave. If the principle of inverting sound waves can be used to cancel out the normal phase sound waves to achieve the purpose of eliminating noise, an electronic inverse voice canceller, In the near future, it can be widely used in various places and in daily life. As far as the above theory of "positive and negative phase sound waves can offset each other", a simple noise countermeasure system is mainly shown in the first figure. It collects voice samples through a microphone A, equalizes and amplifies the noise sample signals appropriately through a set of pre- and equalization amplifier circuits β, and then uses an inverter circuit c to invert the phase of the above-mentioned audio signals, and uses power The amplifier D increases the signal, and finally sends the reverse sound wave of the reverse audio signal through the speaker E, so that the normal phase sound wave and the reversed reverse sound wave of the noise can be phased. Offset to eliminate noise ', but in practice, if you want to obtain a considerable degree of prevention effect, you must overcome the problem of inconsistent phase between the "replicated inverted sound wave" and the "reverse sound wave of the relative position of the noise source" because The inverse sound wave reproduced by the electronic circuit will be affected by the "time delay coefficient" of the circuit and the time delay of the speaker due to physical factors. As a result, the phase of the "replicated reverse sound wave" will lag behind the "reverse sound wave relative position of the voice source" Phase phenomenon; as shown in the second figure, where the A curve is a noise sine wave; and the A- curve is a relative inverse sine wave that can cancel the A curve, and the C curve is a duplicate inverse sine wave. Theoretically, the noise is sine. The wave At point cancellation vector should be A t, but (Please read the precautions on the back before filling in this page}

This paper size applies the Chinese National Standard (CNS) A4 specification (210X297 mm). 83. 3.! 0, 00. Printed by the Consumers' Cooperative of the Central Standards Bureau of the Ministry of Economic Affairs. A5. Description of the invention (〇3) " * 一" ~ ^ Because of the different time delay phenomenon mentioned above, the copied 0 point lags behind the ^ t point. The result of this phase shift will affect the effect of noise reduction. Therefore, it is assumed that Ct is 90 degrees behind At. When the gram point is 90 degrees, its relative inverse position is A t -90 degrees, then the vector 5 Γ + vector 10,000, which is a theoretically ideal positive and negative vector cancellation mode, but when At becomes% Not only 〇At and Oct cannot be offset, but the former offset direction will be generated. 'So the original purpose of copying the inverse sound waves to offset the noise was not achieved, but new noise may be added. In view of this, in order to effectively play the role of the electronic differential inverse noise control system, it is necessary to be able to precisely control the output phase of the inverse sound wave. The present inventor is in response to the above-mentioned demand for anti-voice and actively seeks a solution ' After continuous research and trial work, a differential inverse voice control system that can effectively reduce noise has been successfully invented to effectively solve the voice problem. Therefore, the main object of the present invention is to provide a differential inverse noise control system capable of reducing noise, which is mainly connected to a microphone for collecting noise samples by connecting a front end and the like for amplifying a micro signal. And the equalization amplifier circuit are connected to a phase amplifier circuit and a phase-shift amplifier circuit at the same time, wherein the phase of the phase amplifier circuit and the phase-shift amplifier circuit are at a 90 degree angle, and the phase amplifier circuit and the phase-shift amplifier circuit The amplifier circuit is connected to a variable resistor with adjustable vector gain and a power amplifier that amplifies the signal, and finally to different voice coils of the dual voice coil speaker. A set of resistance vectors is input to the first set of voice coils in the dual voice coil speaker, and then comes from 5. (Please read the precautions on the back before filling this page)

This paper size applies the Chinese National Standard (CNS) A4 specification (210X297 mm) 83. 3.10,000 494701 A7 __ B7 α / ιν (Qi first smells the idea on the back and then writes f) .....- j — II m ·

, 1T ............ j 1_ y I (--------------- V. Description of the invention (04) Phase-shifting amplifier circuit and its variable voltage The input of the second set of voice coils of the second group interacts with each other to achieve the purpose of changing the phase of the sound wave output, so as to effectively control the accuracy of the noise counterpoint. In order to allow your reviewers to further understand the composition, characteristics and other aspects of the present invention For the purpose, the following is a preferred embodiment, which will be described in detail with the drawings and numbers, and at the same time enables those skilled in the technical field to implement it specifically: The present invention is a differential inversion for reducing noise "Voice control system" Please refer to the third figure, which mainly includes a microphone 10, a front and equalization amplifier circuit 20, a phase amplifier circuit, a phase shift amplifier circuit, a power amplifier and a dual voice coil speaker 90. Is used to ensure the accuracy of countering the sound waves to achieve the purpose of reducing noise; as for the detailed structure of the present invention, please refer to the third figure, which has a microphone 10 for collecting voice samples, and a microphone 10 and Connected to a preamp and equalizer circuit 20, of which the preamp and equalization amplifier circuit 20 is used to appropriately equalize and amplify the micro signal picked up by the microphone, and the preamp and equalization amplifier circuit 20 is connected to the phase amplifier circuit and the phase-shift amplifier circuit at the same time, so that The phase amplifying circuit is parallel to the phase-shifting amplifying circuit. The phase amplifying circuit includes a C + non-inverting amplifying circuit 30 at an angle of 0 degrees and an inverting amplifying circuit 35 at a 180-degree angle. The phase-shifting amplifier circuit includes a A C + △ phase-shift amplifier circuit 40 at a 90-degree angle and a C △ phase-shift amplifier circuit 45 at a 270-degree angle, and the C + non-inverting amplifier circuit 30 and the inverting amplifier circuit 35 of the phase amplifier circuit are connected to an optional difference Phase selection switch 50 (that is, SW1) 6 --------- batch clothing ------ 1T ------ line (Please read the precautions on the back before filling this page) This Paper size applies Chinese National Standard (CNS) A4 specification (210X: 297 mm) 83. 3.10,000 494701 A7 • — _B7 V. Description of the invention (0 ^) ~ ^-(Please read the precautions on the back before filling in this Page), this option is connected to a 50 μs sequence with a variable resistor 60 with adjustable vector gain (That is, VRi) and a power amplifier that amplifies the signal (that is, AMP1) 'finally and connected to one of the voice coils of the dual voice coil speaker 90, and the phase-shift amplifier circuit C + △ phase-shift amplifier circuit 4 The phase shift amplifier circuit 45 and Γ △ are connected to a selection switch 55 (that is, SW2) that can select different phase shifts. The selection switch 55 is connected to a variable resistor 65 (that is, VR2) that can adjust the vector gain in sequence. ) And a power amplifier that amplifies the signal (that is, AMP2), and finally connected to another voice coil 85j of the dual voice coil speaker. In this way, the phase amplifier circuit, variable resistor 60 and power amplifier 70 After a set of vectors is input to a set of voice coils in the dual voice coil speaker 90, the 'consultation comes from the phase-shift amplifier circuit, the variable resistor still, and the other set of vectors of the power amplifier 75 input to the second set of voice coils 85 interact to achieve a change The purpose of the sound wave output phase is to form a differential reverse phase noise control system that can adjust the phase of the reverse wave.

As for the working principle of the present invention, please refer to Figures 4 and 5. When the load of the first group of voice coils 80 comes from 0 ° C + non-inverting amplifier circuit 30 C1), then the sound wave of the relative output of the dual voice coil speaker 90 is a 0 degree angle. Conversely, when the load of the second group of voice coils 85 comes from the 90 ° C + △ phase-shift amplifier circuit 40 (the vector is represented by C3), The dual voice coil speaker 90 outputs a sound wave at a 90-degree angle. Suppose that the selection switches 50 and 55 select the C + in-phase amplifier circuit 30 and the C4 △ phase-shift amplifier circuit 40, and their vectors Cl and C3 are equal to 1. Then, At this time, the output phase of the dual voice coil speaker 90 becomes a 45-degree angle, and when we pass the variable resistor 7 83. 3. 10,000 This paper size applies the Chinese National Standard (CNS) A4 specification (210X297 mm) W4701 "Half ?? One S7.C person one page {jf, Liang, Jfip, 〆

Explanation of the invention (〇6) 〇65 When adjusting the gains of ci and C3 vectors, if the variable resistors β〇, 65 change in inverse proportion, then the phase of the sound wave output from the dual voice coil speaker 90 will also show a large angle, Among them, when △, the phase of M will be close to the phase of 0C +; otherwise, when " △, the phase of Wan | will be close to the phase of 〇 △. Through the above explanation, it can be proved by the same reason. The phase of the inverted sound wave output of the dual voice coil speaker can be adjusted by the selection switches 50 and 55, and the gain control of the inverse ratio change of the variable resistors 60 and 65 to freely adjust the output phase of the dual coil speaker 90 within each elephant limit. The inventor will switch the selection switches 50 and 55 and adjust the variable resistors 60 and 65 for a brief explanation. Please refer to the sixth, seventh, and eight figures, in which the non-inverting amplifier circuits 3, c, and The vectors of the inverting amplifier circuit 35, C + △ phase-shifting amplifier circuit 40, and (T △ phase-shifting amplifier circuit 45 are respectively represented by ci, C2, C3, and C4. Therefore, when you select off 50 and 55, you select the c + non-inverting amplifier circuit, respectively. 30 and C + A phase shift amplifier When the circuit is 40, its output phase falls in the first quadrant (Figure 78), and when the variable resistor 60 is turned up and the variable resistor 65 is turned down, the output phase angle will be between 0 ~ 45 degrees (such as Eighth a Fig. 1), conversely, when the variable resistor is turned down, and the variable resistor 65 is turned up, the output phase angle will fall between 45 ~ 90 degrees (such as the eighth a Figure a 2); sequentially when When selecting off 50 and 55, respectively selecting C + in-phase amplifier circuit 30 and C △ phase-shift amplifier circuit 45, the output phase falls in the fourth quadrant (Figure 7B), and when the variable resistor 60 is turned up, and 3 When the variable resistor 65 is adjusted small, the output phase angle will fall between 315 ~ 360 degrees (as in the eighth b-picture)! Conversely, when the variable resistor 60 is adjusted small, and the variable resistor 65 is adjusted large, then 83. 3 · I〇, 〇〇〇 (Please read the precautions on the back before filling in this f) 8 494701 A7

Printed by the Central Government Bureau of the Ministry of Economic Affairs and the Second Consumer Cooperative ¾ The output phase angle will fall between 270 and 315 degrees (such as Figure 8 in Figure 8-2); and when you choose between Guan 50 and 55, you choose the inverting amplifier circuit 35 and 35 respectively. When the C + △ phase-shift amplifier circuit 40 is used, its out-of-phase phase falls in the second quadrant (Figure 7c), and when the variable resistor 60 is turned up, and the variable resistor 65 is turned down, the output phase angle will fall to 135. ~ 180 degree angle (such as the 80th figure 10, otherwise when the variable resistor 60 is turned down, and the variable resistor 65 is turned up, the output phase angle will fall between 90 ~ 135 degree angle (like the eighth c— 2); In addition, when you select Guan Guan 50 and 55 respectively, when the inverting amplifier circuit commits C △ phase shifting circuit 45, its output phase falls in the third quadrant (Seventh D diagram) 'and when it is variable The resistance 60 is increased, and the variable resistance 65 is adjusted to be small. The input phase angle will fall between degrees (such as Figure 80, η I. Otherwise, when the variable resistance 60 is decreased, the variable resistance 65 is increased. , The output phase angle will fall between 225 ~ 270 degrees (such as Figure 80_2). Through the special design of the present invention, use According to the difference between the angle of the inverted sound wave and the noise sound wave, the above-mentioned selection of the switch 5 (), 55, and the gain adjustment of the variable resistors 60, 65 'can be used to make the input dual voice coil speakers 90, two sets of voice coils 80, The load of 85 interacts with each other and outputs the same inverted sound wave as the noise sound wave to achieve the purpose of offsetting the noise. At the same time, the present invention has at least the following effects and enhanced effects; such as: 1. Breaking through the traditional circuit thinking, making the quality difficult The traditional speaker under control is incorporated into the electronic control system to enhance the level of parts. 2. Directly control the phase of the 90 sound wave output of the dual voice coil speaker, regardless of the interference caused by error factors such as electronic appliances and physics. Moving device to control noise more accurately ______9 This paper size is applicable to China National Standard (CNS) A4 specification (210X29? Male 4) ----- 83 · 3.! 0, 〇〇〇 (Jing Xian read the back (Notes for filling in this page)

494701 ΑΊ B7 V. Description of the invention (〇3)

C counterpoint. 4. No complicated calibration circuit is needed, and only a few simple control parts are needed, which can replace precise and expensive calibration instruments and equipment. Summarizing the above descriptions, the present invention can effectively solve the problem that the existing noise counterpoint is not easy to control. At the same time, it has the above advantages and practical value. Therefore, the present invention is indeed a creation that highly utilizes the laws of nature and is not in the same technical field. Seeing that the same or similar products are publicly used, the present invention has met the requirements of the invention patent, and the request is made in accordance with the law, and the invention patent is requested. Please read the notes on the back before filling in this page) This paper size is applicable to China National Standard (CNS) Α4 size (210 ×: 297 mm) 83. 3. 10,000 494701 (20) Front and equalization amplifier circuit ( 35) 〇 Inverting amplifier circuit (45) Γ △ Phase-shifting amplifier circuit (60) (65) Variable resistor (80) (85) Voice coil A7--B7 V. Description of the invention (〇9 j-~ ' One (1) Schematic description Figure 1: The flow chart of the conventional noise countermeasure system. Figure 2: The schematic diagram of the comparison and vectorization of the conventional noise and the counter sonic wave. Figure 2: The control of the present invention Schematic diagram of the circuit configuration of the system. Figures 4 and 5 are schematic diagrams of the sound waves of the present invention represented by vectors. Figure 6 is a detailed list of the phase adjustment of the inverse sound wave of the present invention. Figures 7 and 8 are the adjustment of the reverse wave of the present invention. Vector diagram of phase sound wave. (II) Explanation of drawing number (10) Microphone '(30) C + in-phase amplifier circuit (40) C + △ phase-shift amplifier circuit (50) (55) selector switch (0) (75) power amplifier Circuit (90) Dual Voice Coil Speaker (Please read the notes on the back before filling in this I ·) Printed by Bureau 2 Consumer Cooperatives This paper is sized for China National Standard (CNS) A4 (210 × 29? Ϋ) 83. 3.! 〇, 〇〇〇

Claims (2)

494701 ABCD 6. Application scope of patent if, -3 HI HI 印 Printed by the Consumers' Cooperative of Intellectual Property Bureau of the Ministry of Economic Affairs 1. A differential inverse noise control system with a microphone responsible for collecting noise samples, and the microphone is connected to A preamp and equalization amplifier circuit for equalizing and amplifying a micro signal, and the preamp and equalization amplifier circuit are connected to a phase amplifier circuit and a phase shift amplifier circuit at the same time, wherein the phase amplifier circuit and the phase shift amplifier circuit The phase is 90 degrees, and the phase amplifying circuit and the phase shifting amplifying circuit are respectively connected to a variable resistor that can adjust the vector gain and a power amplifier that amplifies the signal, and finally connected to the different voice coil speakers. In this way, a group of phase coils from the phase amplification circuit and its variable resistor can be input to the first group of voice coils in the dual voice coil speaker, and then input to the The two sets of voice coils interact with each other to achieve the purpose of changing the phase of the sound wave output. Type inverter noise control system. 2. The differential inverting noise control system as described in item 1 of the scope of patent application, wherein the phase amplifier circuit may include a c + non-inverting amplifier circuit and a C inverting amplifier circuit, both of which are connected to a selection switch for Switch. 3. The differential inverse noise control system as described in item 1 of the scope of patent application, wherein the phase-shift amplifier circuit may include a △ phase-shift amplifier circuit and a CT △ phase-shift amplifier circuit, both of which are connected to a selection switch For switching 04, a differential inverse noise control system, which has a microphone responsible for collecting noise samples, the microphone is connected to a pre- and equalization amplifier circuit for equalizing and amplifying a micro signal, and Set and equalize the amplifier circuit and connect it to a phase amplifier circuit and a phase-shift amplifier circuit at the same time, of which 12 papers are suitable for wealth and family (CNS) A4 secret (21GX297 mm) ------ (Please read first (Notes on the back please fill out this I) 111- II. ----, v " line 494701 ABCD VI. Patent application scope The phase amplifier circuit includes a phase-amplifier circuit and a c-inverting amplifier circuit 'while the phase-shift amplifier circuit includes a △ phase-shift amplifier circuit and A phase-shift amplifier circuit, and the phase-amplifier circuit and the phase-shift amplifier circuit are arranged adjacent to each other, and their phases are at an angle of 90 degrees to each other; and the C + non-inverting amplifier circuit and (7 inverting amplifier circuit are connected to a switchable selection switch, The selector switch is sequentially connected to a variable resistor with adjustable vector gain and a power amplifier that amplifies the signal, and finally connected to the first group of voice coils of the dual voice coil speaker, and the phase-shift amplifier of the phase-shift amplifier circuit The circuit and the Γ △ phase-shift amplifier circuit are connected to another selection switch, and the selection switch is connected in sequence to a variable resistor that can adjust the vector gain and a power amplifier that amplifies the signal, and finally to the dual voice coil speaker. On the second group of voice coils; through this, a set of vectors from the phase amplifying circuit and its variable resistor can be input into the dual voice coil speaker after the selection switches are switched. After the first group of voice coils in the amplifier, it interacts with another group of vectors from the phase-shift amplifier circuit and its variable resistor input to the second group of voice coils to achieve the purpose of changing the phase of the sound wave output. This group constitutes an adjustable Differential reverse phase noise control system of reverse wave phase. Printed by the Consumers' Cooperative of Intellectual Property Bureau of the Ministry of Economic Affairs. 13 This paper size applies to Chinese National Standard (CNS) A4 (210 X 297 mm).