JPH0568117U - Amplifier - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide an amplifying device in which the auditory effect is improved by controlling according to human sensitivity. An amplifier 1 having gain control means and a gain control signal whose amplitude is polynomial-approximated and whose period is a function determined by 1 / f fluctuation theory are generated, and the gain control signal is used for gain control. And a control signal generator 2 for supplying the amplifier.

Description

[Detailed description of the device]

[0001]

[Industrial application]

 The present invention relates to an amplification device capable of gain control.

[0002]

[Prior Art]

 In a conventional gain controllable amplification device, a gain control signal is supplied to the amplifier 1 and controlled so as to decrease the gain of the amplifier 1 in response to an increase in the level of the gain control signal.

[0003]

[Problems to be solved by the device]

 However, the above-mentioned gain control of the conventional amplifying device generally controls the gain linearly with respect to the gain control signal, and there is a problem that it cannot be said that the gain control is suitable for human sensitivity. This problem was particularly noticeable in the case of amplification of acoustic signals.

It is an object of the present invention to provide a gain increasing device that enhances the audible effect by performing control that suits human sensibilities.

[0005]

[Means for Solving the Problems]

 The amplifier device of the present invention generates an amplifier having a gain control means, a gain control signal whose amplitude is polynomial approximated, and a period is a function determined by 1 / f fluctuation theory, and the gain control signal is gained. A control signal generator for supplying the amplifier to the amplifier for control.

Further, a sound effect signal source whose output is an input signal to the amplifier may be provided. Further, in addition to the effect sound signal source, a combining means for combining the output of the amplifier and an external signal may be provided.

[0007]

According to the amplifying device of the present invention, the gain of the amplifier is controlled based on a function in which the amplitude output from the control signal generator is approximated by a polynomial and the period is determined by the 1 / f fluctuation theory.

When the sound effect signal source is provided, the sound effect signal output from the sound effect signal source is amplified in the amplifier based on the gain control signal output from the control signal generator. Furthermore, when the synthesizing means is provided, the sound effect signal amplified based on the gain control signal output from the control signal generator and the external signal are synthesized and output.

[0009]

【Example】

 Hereinafter, the present invention will be described with reference to examples. FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention.

Reference numeral 2 generates a gain control signal whose amplitude is polynomial-approximated and whose period is a function determined by the 1 / f fluctuation theory, and supplies the gain control signal to the amplifier for gain control. The gain control signal output from the control signal generator 2 is supplied to the gain controllable amplifier 1 to control the gain of the amplifier 1 based on the gain control signal.

The control signal generator 2 previously stores a function whose amplitude can be approximated by a polynomial, such as a linear function or a quadratic function, and the period is determined based on the 1 / f fluctuation theory. A control signal generator 2 outputs a gain control signal according to a function determined based on the Gig theory.

In the amplifier 1 to which the gain control signal output from the control signal generator 2 is supplied, the input signal is amplified and output with a gain value based on the gain control signal. Therefore, when amplification is performed by the amplifier 1, an output signal in which the strength is repeated at a cycle determined by the 1 / f fluctuation theory is obtained. 2A shows an example of the gain control signal, FIG. 2B shows an example of the input signal, and FIG. 2C shows an example of the output signal. In FIG. 2A, 1 / (period T) is determined based on 1 / f fluctuation.

Next, an application example of this embodiment will be described with reference to FIG. This application example is an example in which a sound effect signal is applied to the input signal of the amplifier A of the embodiment of the present invention, and the output signal of the amplifier A and the external input signal are mixed and reproduced by the speaker.

In this application example, the ROM 11 stores predetermined sound effect information such as a wave sound and a murmur sound, and the control unit 13 controls the changeover switch 14 based on an instruction from the input unit 12. , The center frequency and bandwidth of the filter described later are selected, and the stored sound effect is selected and output by the ROM 11. The output of the changeover switch 14 is supplied to and amplified by the amplifier A, and the amplified output is supplied to the mixer 18. On the other hand, the reproduction signal output from the CD player 15 is amplified by the amplifier 16, and the amplified output of the amplifier 16 is supplied to the filter 17 and the mixer 18 as an external signal. The amplified output of the amplifier 16 is supplied to the left and right speakers 19 and 20, and the output of the mixer 18 is supplied to the left and right speakers 21 and 22.

In the application example configured as described above, when one of the sound effects is designated by the input unit 12, the sound effect information instructed from the sound effect information stored in the ROM 11 by the control unit 13 is displayed. While being selected and repeatedly read, the switching switch 14 is switched to the control unit 13 side, and the sound effect information is converted into an analog signal and then amplified by the amplifier A.

The amplified output from the amplifying apparatus A becomes a signal in which the strength is repeated with a cycle of 1 / f fluctuation as described in the above-mentioned embodiment, and is output from the amplifying apparatus A. On the other hand, the reproduction signal from the CD player 15 is amplified by the amplifier 16, and the amplified output by the amplifier 16 is reproduced by the left and right speakers 19 and 20, and at the same time, the effect sound signal output from the amplifier A in the mixer 18 is output. The added output is added and reproduced by the left and right speakers 21 and 22, and a synthesized sound of the sound effect and the reproduced sound from the CD player 15 is output. Therefore, the amplifying apparatus A can output together a sound effect and a music signal that make people feel at ease.

When band selection is designated in the input unit 12, the control unit 13 switches the switching switch 14 to the output side of the filter 17, and the center frequency designated in the input unit 12 and the designated band are designated. The filter is switched to the width. The reproduced signal of the CD player 15 amplified by the amplifier 16 is supplied to the switched filter 17, filtered by the filter 17, and amplified by the amplifier A.

The amplified output from the amplifier A becomes a signal in which the strength is repeated with the cycle of 1 / f fluctuation, and is output from the amplifier A. The output from the amplifier A and the output from the amplifier 16 are added in the mixer 18, and the added output is reproduced in the speakers 21 and 22 to output a synthesized sound. The output of the amplifier 16 is reproduced in the speakers 19 and 20. Therefore, the amplification device A can output a music signal that makes a person feel comfortable and a reproduced sound from the CD player 15 together.

[0019]

[Effect of the device]

 As described above, according to the present invention, the gain of the amplifier is controlled based on the function that the amplitude output from the control signal generator is polynomial-approximated and the period is determined by the 1 / f fluctuation theory. Therefore, it has the effect of giving a feeling of comfort to the person who hears the sound from the amplified output. In addition, when driving a vehicle with severe emotional ups and downs, the mind becomes calm, and it has the effect of creating an appropriate amount of tension to prevent drowsiness.

When the sound effect signal source is provided, the sound effect signal output from the sound effect signal source is amplified by the amplifier based on the gain control signal output from the control signal generator. , Playing sound effect has the effect of giving a feeling of comfort to the person who hears it. When a synthesizer is further provided, the effect sound signal amplified based on the gain control signal output from the control signal generator and the external signal are combined and output, and the reproduced sound is heard. It has the effect of giving a feeling of peace to the person who made it.

[Brief description of drawings]

FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention.

FIG. 2 is a waveform diagram for explaining the operation of one embodiment of the present invention.

FIG. 3 is a block diagram showing a configuration of an application example of an embodiment of the present invention.

[Explanation of symbols]

 1 Gain controlled amplifier 2 Control signal generator

Claims (3)

[Scope of utility model registration request] 1. An amplifier having gain control means and a gain control signal whose amplitude is polynomial-approximated and whose period is a function determined by 1 / f fluctuation theory and which is used for gain control. And a control signal generator for supplying the amplifier to the amplifier. 2. The amplifying apparatus according to claim 1, further comprising a sound effect signal source whose output is an input signal of the amplifier. 3. The amplifying device according to claim 2, further comprising a synthesizing means for synthesizing an output of the amplifier and an external signal.