JPH0847079A - Acoustic equipment - Google Patents

Abstract

PURPOSE:To provide a means comparing a difference between a frequency characteristic set by a graphic equalizer installed in the body of the acoustic equipment with an actual frequency characteristic at a listening point so as to confirm or correct the difference. CONSTITUTION:A frequency characteristic correction switch 9 is thrown to the position (b) and while a reproduced program given to an input terminal 10 from a speaker 4 is listened to, preferred sound quality is adjusted by a characteristic operation button 6 and the sound is sent from a remote control transmitter 7 to the body 1 acoustic equipment, a graphic equalizer 11 is set and confirmed by a display section 3. Then the switch 9 is thrown to the position (a), an output of each band oscillator 25 is outputted from a speaker 4 under the control of a remote control receiver 5 and a peak level for each frequency band outputted from the speaker 4 and received by a microphone 8 is digitized and the result is sent to the body 1, a comparator 16 compares an equalizing characteristic of the body 1 with the equalization characteristic applied to the microphone 8 and displays the result on a display section 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an audio device for freely changing the frequency characteristics of music or audio signals for reproduction.
More specifically, it relates to a device capable of confirming or correcting the actual frequency characteristic at the listening point.

[0002]

2. Description of the Related Art Conventionally, when a certain music signal source is reproduced or received by using a tuner, the contents of the source (for example, classical music, song or rock)
By adjusting the frequency characteristic curve operating knob of the graphic equalizer, the music with the characteristic according to the curve is played, and you can listen to the music of the atmosphere suitable for the song.

[0003]

However, in the conventional reproducing apparatus as described above, at least the characteristics when output from the speaker are the specified characteristics, but in the actual listening place, the desired characteristics are obtained. Often not.
This occurs because there is an acoustic obstacle between the speaker and the ear, or the characteristics of the reproduced sound change due to the directivity of the speaker. The present invention eliminates such conventional problems,
It is an object of the present invention to provide an audio device that enables to match desired characteristics at any position.

[0004]

In order to achieve the above object, the audio device of the present invention has the structure of claim 1 in which each band oscillator, an equalizer section, a power amplifier, a speaker, a remote control receiver, and a first band. An audio device main body having a pass filter, a first peak value detection circuit, a comparator for comparing the reception results of the first peak value detection circuit and the remote control receiver, a display section, a display control section, and an equalizer control section. , A microphone, a second bandpass filter, a second peak value detection circuit, an equalizer setting unit, and a remote control unit having a remote control transmitter. A configuration in which the remote control unit is equipped with an equalizer setting unit that generates a signal for adjusting the equalizer unit of You have me. According to the third aspect, the equalizer control section is configured to temporarily store the output of the comparator and control the adjustment of a specific frequency band of the equalizer section according to the result.

[0005]

According to the audio device of the present invention, in the configuration of claim 1, the output of each band oscillator passes through the equalizer section, the power is amplified, and the sound output from the speaker is captured by the microphone of the remote control section. The second bandpass filter separates each frequency band and the second peak value detection circuit detects the peak value for each frequency band.
It is sent from the remote control transmitter to the main unit, given from the remote control receiver of the main unit to the comparator,
On the other hand, the output of the equalizer section is peak-detected for each frequency band of the equalizer section by the first bandpass filter and the first peak value detection circuit, and the reception result with the remote control receiver is compared by the comparator, The comparison result is displayed on the display unit.

According to the second aspect of the present invention, by further operating the equalizer setting section of the remote control section, a signal for equalizer adjustment generated from this is transmitted from the remote control transmitter to the main body, and the equalizer control section outputs the sound. It acts to manipulate the characteristics of the equalizer section of the device body.

According to the structure of claim 3, the data obtained from the comparator in the structure of claim 1 is temporarily stored in the equalizer control part, and the characteristic of the equalizer part of the audio apparatus main body is set to the initial target value by this data. Acts to converge.

[0008]

EXAMPLE An example of the audio device of the present invention will be described below.
A detailed description will be given with reference to the drawings. In FIG. 1 showing a perspective view of an embodiment of an audio device of the present invention, an audio device main body 1 (hereinafter referred to as a main body) is operated by a remote control unit 2. The main body 1 is provided with a level display section 3 for each frequency, a speaker 4, and a remote control receiver 5. Further, the remote control section 2 is provided with a characteristic operation button 6 for raising and lowering the level of each frequency, a remote control transmitter 7, a microphone 8 for receiving sound pressure from the speaker 4, and a frequency characteristic correction switch 9.

In the block diagram of FIG. 2, from the input terminal 10 of the main body 1, for example, a reproduction signal of a compact disc (CD), an input signal signal from a tuner, a reproduction signal of a tape, or the like, a signal having a level of about -30 db, for example. Enter. This input signal is the graphic equalizer 1
In 1, the gain is raised or lowered for each frequency band divided into a plurality. The output of the graphic equalizer 11 is power-amplified by the power amplifier 12 and reproduced by the speaker 4.

On the other hand, a part of the output of the graphic equalizer 11 is amplified by the amplifier 18, and the output of the amplifier 18 is first passed through the first bandpass filter 19 divided into the same plural frequency bands as the graphic equalizer 11. Connected to the peak value detection circuit 17 of the first peak value detection circuit 17, the output of the first peak value detection circuit 17 is input to one input terminal of the comparator 16, and the other input terminal of the comparator 16 is connected to the remote control receiver 5. A signal is input and the two signal levels are compared. The comparison output of the comparator 16 is input to the graphic equalizer control unit 13 that controls the graphic equalizer 11 via the switch 15, and the graphic equalizer control unit 13
Gives a control signal to the display control unit 14,
The display control unit 14 controls the display of the display unit 3. Further, each band oscillator 25 that covers the entire band of the graphic equalizer 11 is provided at the input of the graphic equalizer 11, and this may be one that individually emits the center frequency of each band of the graphic equalizer 11 and that of the white noise. It may be generated at an even level over each band as described above, and its oscillation is controlled by the remote control receiver 5 as described later.

In the remote control unit 2, the output of the microphone amplifier 20 for amplifying the signal of the microphone 8 is connected to the second bandpass filter 21, and the output thereof is connected to the second peak value detection circuit 22. The peak value of the output of the second peak value detection circuit 22 is converted into a digital signal by the AD converter 27 and applied to the remote control transmitter 7 via the switch 9. The graphic equalizer setting unit 23 is the frequency characteristic correction switch 9 of FIG.
The graphic equalizer can be set when is pressed and the characteristic operation button 6 is operated.

The operation of the first embodiment of the present invention configured as described above will be described below. First, the characteristics of the graphic equalizer 11 are set by remote control. For example, when playing back a CD and listening to music with a desired sound quality, by pressing the frequency characteristic correction switch 9 of the remote control unit 2 shown in FIG. 1 and operating the characteristic operation button 6, the remote shown in FIG. Control part 2
The control signal of the graphic equalizer setting unit 23 is transmitted via the fixed terminal b side of the switch 9 and the remote control transmitter 7, and the signal is received by the remote control receiver 5 of the main body 1 and the fixed terminal b of the switch 15. It is input to the graphic equalizer controller 13 via the side. And graphic equalizer 11
Of the graphic equalizer 1 that has been operated by controlling the display control section 14 so that the display has a characteristic matching the operation of the characteristic operation button 6.
The characteristic No. 1 is displayed on the display unit 3. The output signal of the graphic equalizer 11 is output from the speaker 4 via the power amplifier 12.

Next, the measurement of the equalizing characteristic at the listening position will be described. When the switch 9 attached to the remote control unit 2 is pressed again, as shown in FIG. 2, the movable contact contacts the side b to the side a, and the remote control transmitter 7 generates and transmits a signal to measure the characteristics. Then, the remote control receiver 5 on the main body 1 side stops the signal input from the input terminal 10,
Each band oscillator 25 is oscillated. Switch 15 at the same time
The movable contact of is switched from the fixed contact b to a.

Then, the microphone 8 is replaced by the speaker 4
When it receives the reproduced sound signal from, it is amplified by the microphone amplifier 20 and divided by the second band pass filter 21 into each band (f0 to f4) which is the same as the center frequency of each band of the graphic equalizer 11, and its output is The second peak value detection circuit 22 detects the peak value. As a method of detecting a peak, for example, several tens of kh, which is more than twice the highest frequency
The signal is sampled by the clock of z, and the signal is quantized by, for example, 6 bits. The peak value at that time is transmitted from the remote control transmitter 7.

The transmitted data is input to the comparator 16 from the remote control receiver 5, and the output of the graphic equalizer 11 is passed through the amplifier 18 and the first bandpass filter 19 in the first peak value detection circuit 17. The peak value is detected in the same manner as described on the remote control section 2 side, this data is input to the comparator 16, and the respective data are compared by the comparator 16. FIG.
Then, D1 is the output data of the first peak detection circuit, D2 is the data sent from the remote control unit 2 side, and D3 is the output data of the comparator 16. At this time, for example, with respect to f2 (1 kHz), other f0, f1, f
The values obtained by subtracting the output of f2 from the respective outputs of 2, f3 and f4 are sent to the graphic equalizer controller 13. This is because the characteristics are displayed regardless of the position of the volume volume of the main body or the position received by the remote control unit 2. The data sent to the graphic equalizer controller 13 is displayed by the display control unit 14.
Is input to the display unit 3 and a specific time is displayed on the display unit 3 by a display timer (not shown).

From this, it is possible to understand how the frequency characteristic at the position of the microphone 8 of the remote control unit 2 is affected by the surrounding conditions and changed with respect to the characteristic of the graphic equalizer 11 which is initially set. If so, based on this result, it is possible to return to the initial state and change the setting. This display method may display only the output data of the comparator 16, or if there is a display space, it is possible to display both by aligning it with the characteristic of the graphic equalizer 11 that was initially set, for example by changing the display color respectively. Even easier to understand.
After the display timer specific time elapses, the output data of the comparator 16 and the characteristic of the graphic equalizer 11 initially set disappear, the oscillation of each band oscillator 25 also stops, and instead the signal input from the input terminal 10 is input. Is reproduced from the speaker and the function of the remote control transmitter 7 is stopped. For this operation, both the remote control transmitter 7 and the display control unit 14 may have a timer, or only the remote control transmitter 7 may have a timer so that the display is stopped when the transmission is stopped. Good.

Although the output of the second peak value detection circuit 22 is converted into a digital value in the above description, it may be transmitted as an analog value. In that case, the data in the main body 1 may be adjusted accordingly.

Next, a second embodiment of the present invention will be described. 2 differs from the first embodiment in the configuration and operation of the graphic equalizer control unit 13. That is, the data provided from the comparator 16 to the graphic equalizer control unit 13 is temporarily stored in the memory in the graphic equalizer control unit 13 for each frequency band. After that, after the output from the comparator 16 is cut off by the transmission stop by the timer from the remote control transmitter 7 or other means, the characteristic of the graphic equalizer 11 is corrected by the data in this memory so that the difference becomes zero. To control. At the same time, the new characteristics corrected temporarily or permanently by the display unit 3 via the display control unit 14 may be displayed. According to the second embodiment, even when the listening position is moved after the equalizer characteristic is once determined or the situation of the obstacle in the room is changed, the initially determined characteristic can be easily approached. Also, it is effective when the initial determination of the equalizer characteristics requires direct operation of the main unit rather than remote control.

[0019]

As described above, according to the audio device of the present invention, the level of each frequency of each band oscillator output of the audio device main body is received by the microphone attached to the remote control section via the speaker. The level of each frequency is sent back to the main unit side by the remote control transmitter and compared with the graphic equalizer characteristic with the comparator, the result is displayed, or the difference is set so that the graphic equalizer has the desired value. To correct.

Thus, in response to a change in the listening position or a change in the acoustic environment in the room, the change is displayed so that the desired sound reproduction characteristic is obtained from the speaker, or the desired characteristic is corrected. Therefore, it is possible to listen with desired acoustic characteristics regardless of the position of the acoustic device or the listening position.

[Brief description of drawings]

FIG. 1 is an external perspective view of an audio device according to an embodiment of the present invention.

FIG. 2 is a block diagram showing the configuration of the same.

FIG. 3 is a waveform diagram showing an example of comparator output data.

[Explanation of symbols]

1 audio device main body 2 remote control section 3 display section 4 speaker 5 remote control receiver 7 remote control transmitter 8 microphone 9 frequency characteristic correction switch 11 graphic equalizer (equalizer section) 12 power amplifier (power amplifier) 13 graphic equalizer control section ( Equalizer control unit) 14 Display control unit 15 Switch 16 Comparator 17 First peak value detection circuit 19 First bandpass filter 21 Second bandpass filter 22 Second peak value detection circuit 23 Graphic equalizer setting unit (equalizer) Setting unit) 24 AD converter 25 Each band oscillator

Claims (6)

[Claims] 1. A band oscillator that generates a required frequency band or a plurality of specific frequencies, and an equalizer unit that receives the output of each band oscillator and can individually adjust a plurality of specific frequency band levels, A power amplifier that amplifies the output of the equalizer unit, a speaker that acoustically outputs the output of the power amplifier, a remote control receiver, and a first band that divides the output of the equalizer unit into a plurality of specific frequency bands. A pass filter, a first peak value detection circuit that detects a peak for each frequency band of the first band pass filter, and a reception result of the remote control receiver and the first peak value detection circuit are compared. A comparator, a display unit that displays the output of the comparator, a display control unit that controls the display of the display unit, and an output of the comparator. An audio device main body having an equalizer control part for displaying the output controlled by the display part via the display control part, a microphone for converting the acoustic output of the speaker of the audio device main body into an electric signal, and the microphone. A second bandpass filter that divides the output of the output into a plurality of specific frequency bands, a second peak value detection circuit that detects a peak for each frequency band of the output of the second bandpass filter, A remote control unit having a remote control transmitter for transmitting the output of the second peak value detection circuit to the remote control receiver of the audio device body, and the information of the second peak value detection circuit is remote controlled. When sending to the remote control receiver via the transmitter, Only the output of the comparator is output from the speaker, the output of the remote control receiver and the output of the first peak value detection circuit are compared in a comparator stage, and the equalizer control unit is controlled by the output of the comparator stage. An audio device characterized by being displayed on a display unit. 2. A band oscillator that generates a required frequency band or a plurality of specific frequencies, and an equalizer unit that receives an output of each band oscillator and that can individually adjust a plurality of specific frequency band levels. A power amplifier for amplifying the output of the equalizer section, a speaker for acoustically outputting the output of the power amplifier, a remote control receiver, and a characteristic controlled by the reception result of the remote control receiver when setting the characteristic of the equalizer section. An equalizer control unit that controls adjustment of a specific frequency band of the equalizer unit, a first bandpass filter that divides the output of the equalizer unit into a plurality of specific frequency bands, and each of the first bandpass filters. The first peak value detection circuit that detects the peak for each frequency band, A comparator that compares the reception results of the first peak value detection circuit and the remote control receiver and controls the equalizer control unit with the result, a display unit that displays the control result of the equalizer control unit, and the equalizer. An audio device main body having a display control unit that controls the display of the display unit under the control of the control unit, a microphone that converts the acoustic output of the speaker of the audio device main body into an electrical signal, and the output of the microphone is A second bandpass filter that divides into a specific frequency band, a second peak value detection circuit that detects a peak for each frequency band of the output of the second bandpass filter, and an equalizer unit of the acoustic device body. An equalizer setting unit that generates a signal for adjusting the second peak value detection circuit and the equalizer setting unit. A remote control unit having a remote control transmitter for transmitting any output of the setting unit and the remote control receiver of the audio apparatus main body, and transmitting information of the second peak value detection circuit by the remote control transmission. When sending to the remote control receiver via a transmitter, only the output of each band oscillator is output from the speaker, and the output of the remote control receiver and the output of the first peak value detection circuit are compared with the comparison circuit. The acoustic device characterized in that the equalizer control unit is controlled by the output of the comparison circuit and displayed on the display unit. 3. A band oscillator for generating a required frequency band or a plurality of specific frequencies, and an equalizer unit for receiving the output of each band oscillator and individually adjusting a plurality of specific frequency band levels. A power amplifier that amplifies the output of the equalizer unit, a speaker that acoustically outputs the output of the power amplifier, a remote control receiver, and a first band that divides the output of the equalizer unit into a plurality of specific frequency bands. A pass filter, a first peak value detection circuit that detects a peak for each frequency band of the first band pass filter, and a reception result of the remote control receiver and the first peak value detection circuit are compared. And a comparator for temporarily storing the output of the comparator and adjusting the specific frequency band of the equalizer unit according to the result. An equalizer control section for controlling the equalizer control section, a display section for displaying the control result of the equalizer control section, and a display control means for controlling the display of the display section under the control of the equalizer control section; A microphone that converts the acoustic output of the speaker of the main body into an electric signal, a second bandpass filter that divides the output of the microphone into a plurality of specific frequency bands, and each frequency of the output of the second bandpass filter. A remote control unit having a second peak detection unit that detects a peak for each band, and a remote control transmitter that transmits the output of the second peak detection unit to a remote control receiver of the acoustic apparatus body. Sound equipment. 4. When the information of the second peak value detection circuit is sent to the remote control receiver via the remote control transmitter, it has a timer means for displaying on the display unit for a specific time. The acoustic device according to claim 1. 5. The acoustic device according to claim 1, wherein each band oscillator includes at least frequencies included in each of a plurality of specific frequency bands of the equalizer section. 6. The acoustic device according to claim 1, wherein each band oscillator includes all frequencies included in a plurality of specific frequency bands of the equalizer section.