A control method and application of dual vibration transducer

Abstract

The present invention relates to a control method of a dual-vibration transducer, comprising the following steps: S1, after obtaining a signal for switching the volume, detecting the real-time volume of two current speakers; S2, judging whether the current volume is lower than a critical value; S3, when it is not lower than the critical value, the two speakers keep inputting the same-phase electrical signal, so that the two speakers move in opposite directions, offset the vibration energy, reduce the resonance of the casing, and start the vibration reduction mode; when it is lower than the critical value, inputting the opposite-phase electrical signal to the speaker 2, so that the two speakers move in the same direction, one side of the diaphragm squeezes the air inward, and the other side of the diaphragm squeezes the air outward, and starts the low-volume mode. The transducer increases the judgment of the volume. In the low-volume mode, due to its own low vibration energy, the resonance of the casing is small, and the low-volume mode is enabled, which can greatly improve the low-frequency sound effect; when the volume is large and the resonance of the casing is greatly affected, the vibration reduction mode is enabled to improve the resonance.

Description

Technical Field

[0001] The present invention relates to the technical field of transducers, and in particular to a control method and application of a dual-vibration transducer. Background Art

[0002] Electronic devices use transducers to output sound signals, and often they are not output at rated power, but work at a low volume. When working at a low volume, there are often problems with poor performance and harsh sound. For dual-vibration transducers, when working at a low volume, the energy is not enough to cause the housing to work noticeably, and the vibration reduction mode has no effect at this time. Summary of the invention

[0003] The technical problem to be solved by the present invention is: in order to overcome the deficiencies in the prior art, a control method and application of a dual-vibration transducer is provided.

[0004] The technical solution adopted by the present invention is: a control method of a dual-vibration transducer, comprising the following steps:

[0005] S1. After obtaining the signal for switching the volume, detect the real-time volume of the two speakers;

[0006] S2, determining whether the current volume is lower than the critical value;

[0007] S3, when it is not less than the critical value, the two speakers keep inputting the same-phase electrical signal, so that the two speakers move in opposite directions, offset the vibration energy, reduce the resonance of the housing, and start the vibration reduction mode;

[0008] When it is lower than the critical value, an electrical signal of opposite phase is input to speaker 2, so that the two speakers move in the same direction, one diaphragm squeezes the air inward, and the other diaphragm squeezes the air outward, starting the low volume mode. At this time, the volume inside the speaker box hardly changes, and no air pressure is generated (the pressure difference with the outside world is extremely small), which is equivalent to an infinitely large back cavity, that is, the volume of the speaker box cavity can be infinitely large;

[0009] Among them, the dual-vibration transducer uses two groups of transducers stacked back to back.

[0010] Furthermore, by the following formula It can be seen that, in the formula, F0 is the natural frequency of the transducer, Fc is the resonant frequency of the transducer after cavity filling, Vas is the equivalent volume compliance, Vb is the volume of the sound box cavity,

[0011] When Vb is infinite, Fc decreases and approaches F0.

[0012] Vb in the vibration reduction mode is less than Vb in the low volume mode, and Fc in the vibration reduction mode is greater than Fc in the low volume mode and F0, so the low-frequency performance in the low volume mode is increased, and the listening experience in the low volume mode is softer than that in the vibration reduction mode.

[0013] Furthermore, by the following formula It can be seen that, in the formula, P is the sensitivity, BL is the transducer force factor, U is the voltage, Sd is the equivalent area, Re is the resistance, and Mms is the dynamic mass. The sensitivity is affected by the above factors.

[0014] Furthermore, it also includes using an equalizer to increase the low-frequency voltage to improve the low-frequency sound effect. When increasing the low-frequency voltage, there will be an upper limit due to the limited capacity of the power supply or power amplifier. When Fc is reduced, the voltage required to increase to the same volume at the same frequency will be reduced, so as to increase the adjustment space of the equalizer, that is, when using the low volume mode, the voltage adjustment space will be increased.

[0015] Dual vibration transducers are used in electronic devices.

[0016] Compared with the prior art, the present invention has the following advantages: the transducer of the present invention increases the judgment of the volume. In the low volume mode, due to its own low vibration energy, the effect on the resonance of the casing is small. Enabling the low volume mode can greatly improve the low-frequency sound effect; when the volume is large and the effect on the resonance of the casing is large, enabling the vibration reduction mode can improve the resonance. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a control flow chart of the present invention;

[0018] Figure 2 is a schematic diagram of a dual-vibration transducer of the present invention;

[0019] Figure 3a is a schematic diagram of the vibration reduction mode of the dual vibration transducer of the present invention;

[0020] Figure 3b is a schematic diagram of a low volume mode of a dual-vibration transducer of the present invention;

[0021] Figure 4a It is a principle diagram of the vibration reduction mode of the dual vibration transducer of the present invention;

[0022] Figure 4b is a schematic diagram of the low volume mode of the dual-vibration transducer of the present invention;

[0023] Figure 5 is a sensitivity curve diagram of the dual-vibration transducer of the present invention;

[0024] Figure 6 is an amplitude curve diagram of the dual-vibration transducer of the present invention;

[0025] Figure 7It is the EQ curve diagram of the present invention. DETAILED DESCRIPTION

[0026] The embodiments of the present invention are described in detail below. The embodiments are implemented on the premise of the technical solution of the present invention, and detailed implementation methods and specific operation processes are given, but the protection scope of the present invention is not limited to the following embodiments.

[0027] like Figure 1-Figure 4b As shown, a control method for a dual-vibration transducer comprises the following steps:

[0028] S1. After obtaining the signal for switching the volume, detect the real-time volume of the two speakers;

[0029] S2, determining whether the current volume is lower than the critical value;

[0030] S3, when it is not lower than the critical value, the two speakers keep inputting the same phase electrical signal, so that the two speakers move in opposite directions, offset the vibration energy, reduce the resonance of the housing, and start the vibration reduction mode, such as Figure 3a As shown;

[0031] When it is lower than the critical value, an electrical signal of opposite phase is input to speaker 2, so that the two speakers move in the same direction, one diaphragm squeezes the air inward, and the other diaphragm squeezes the air outward, starting the low volume mode. At this time, the volume inside the speaker box hardly changes, and no air pressure is generated (the pressure difference with the outside world is extremely small), which is equivalent to an infinitely large back cavity, that is, the volume of the speaker box cavity can be infinitely large;

[0032] Among them, the dual-vibration transducer uses two groups of transducers stacked back to back.

[0033] By the following formula It can be seen that, in the formula, F0 is the natural frequency of the transducer, Fc is the resonant frequency of the transducer after cavity filling, Vas is the equivalent volume compliance, Vb is the volume of the sound box cavity,

[0034] When Vb is infinite, Fc decreases and approaches F0.

[0035] Vb in the vibration reduction mode is less than Vb in the low volume mode, and Fc in the vibration reduction mode is greater than Fc in the low volume mode and F0, so the low-frequency performance in the low volume mode is increased, and the listening experience in the low volume mode is softer than that in the vibration reduction mode.

[0036] By the following formula It can be seen that, in the formula, P is the sensitivity, BL is the transducer force factor, U is the voltage, Sd is the equivalent area, Re is the resistance, and Mms is the dynamic mass. The sensitivity is affected by the above factors.

[0037] like Figure 5 and Figure 6As shown, 2W is the curve of the dual-vibration transducer at high voltage, 0.25W is the curve of the conventional dual-vibration transducer at low voltage, and 0.25W-new is the curve of the dual-vibration transducer in low volume mode at low voltage. Under the same conditions, the sensitivity and vibration reduction effect of the dual-vibration transducer in low volume mode are significantly better than those of the conventional dual-vibration transducer.

[0038] like Figure 7 As shown, it also includes using an equalizer to increase the low-frequency voltage to improve the low-frequency sound effect. When increasing the low-frequency voltage, there will be an upper limit due to the limited capacity of the power supply or amplifier. In low volume mode, when Fc is reduced, at the same frequency, the voltage required to increase to the same volume will be reduced, so as to increase the adjustment space of the equalizer.

[0039] Dual vibration transducers are used in electronic devices.

Claims

1. A control method for a dual-vibration transducer, characterized in that: The following steps are involved: S1. After obtaining the signal for switching the volume, detect the real-time volume of the two speakers; S2, determining whether the current volume is lower than the critical value; S3, when it is not less than the critical value, the two speakers keep inputting the same-phase electrical signal, so that the two speakers move in opposite directions, offset the vibration energy, reduce the resonance of the housing, and start the vibration reduction mode; When the volume is lower than the critical value, an electrical signal with an opposite phase is input to speaker 2, so that the two speakers move in the same direction, one diaphragm squeezes the air inwards, and the other diaphragm squeezes the air outwards, thus starting the low volume mode. Among them, the dual-vibration transducer uses two sets of transducers stacked back to back; By the following formula It can be seen that, in the formula, F0 is the natural frequency of the transducer, Fc is the resonant frequency of the transducer after cavity filling, Vas is the equivalent volume compliance, Vb is the volume of the sound box cavity, When Vb is infinite, Fc decreases and approaches F0. Vb in the vibration reduction mode is less than Vb in the low volume mode, and Fc in the vibration reduction mode is greater than Fc in the low volume mode is greater than F0, so the low frequency performance in the low volume mode is increased, and the listening experience in the low volume mode is softer than that in the vibration reduction mode; By the following formula It can be seen that, in the formula, P is the sensitivity, BL is the transducer force factor, U is the voltage, Sd is the equivalent area, Re is the resistance, and Mms is the dynamic mass. The sensitivity is affected by the above factors.

2. The control method of the dual-vibration transducer according to claim 1, characterized in that: It also includes using an equalizer to increase the low-frequency voltage to improve the low-frequency sound effects. When increasing the low-frequency voltage, there will be an upper limit due to the limited capacity of the power supply or amplifier. When Fc is lowered, at the same frequency, the voltage required to increase the same volume will be reduced, thereby increasing the adjustment space of the equalizer.

3. The control method of the dual-vibration transducer according to any one of claims 1-2, characterized in that: The dual-vibration transducer is applied to electronic equipment.

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