JP2000032585A - Sound quality correction circuit for audio equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain desired sound quality with a simple operation by synthesizing an equalizer curve to enhance a sound frequency that is difficult to be heard by a hard-of-hearing person. SOLUTION: This sound quality correction circuit 100 is provided with a 1st sound quality adjustment means 1, that has an equalizer function to adjust sound quality by varying the frequency characteristics, a 2nd sound quality adjustment means 2, that is provided separately from the 1st sound quality adjustment means 1 for setting frequency characteristics enhancing a sound frequency hardly heard by a hard-of-hearing person, and a synthesis means 3 that synthesizes both the frequency characteristics set by the 1st and 2nd sound quality adjustment means 1, 2 to generate a synthesized frequency characteristics for sound quality compensation.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sound quality correcting circuit for an audio device, and more particularly to a sound quality correcting circuit for a hearing impaired person, such as an elderly person, who has difficulty in hearing the high-frequency range, by a simple operation. The present invention relates to a sound quality correction circuit for an audio device.

[0002]

2. Description of the Related Art An audio device is provided with an equalizer function for performing filtering processing having a specific frequency characteristic on an original sound signal in order to make sound quality output from a speaker to a sound quality suitable for a user's preference. Have been.

For example, in an equalizer mounted on a conventional sound quality correction device, a LOU emphasizing a high frequency range and a low frequency range is used.
Several patterns of equalizer carp such as D-position and V0CAL position emphasizing the midrange are registered, or an equalizer curve according to the user's preference is registered, and one of them is selected and the speaker is selected. It is configured to be able to adjust the frequency characteristics of the audio output from the device. FIG. 5 shows an example of the equalizer curve in the LOUD position. FIG.
It can be understood from the equalizer curves shown in (1) and (2) that the signal levels in the high frequency range and the low frequency range are enhanced.

[0004]

By the way, many elderly people find it very difficult to hear the high frequency range. In addition to the elderly, there are many hearing-impaired persons who have difficulty in hearing not only the high frequency range but also other specific frequency ranges. However, the sound quality correction circuit of the conventional audio device does not have a function such as an equalizer curve for correcting a sound quality that is difficult to hear for the elderly or a hearing impaired person to a sound quality that is easy to hear. The equalizer curve as described above had to be set by itself after a complicated operation, and the operability was extremely poor for users such as the elderly.

[0006] Therefore, a hearing-impaired person tends to increase the volume in order to listen to a sound range that is difficult to hear, and the volume is too loud for a nearby person, which may be unpleasant.

[0007] Even if a hearing-impaired person can take a complicated procedure to set a desired equalizer curve and adjust the sound quality so that he / she can easily listen to it, another person can use this sound quality correction device next. If the equalizer is changed when using a device having the same, there is a risk that an equalizer carp made by a hearing-impaired person will be canceled.

It is an object of the present invention to provide a sound quality correction circuit for an audio device which can solve the above-mentioned problems and can obtain a predetermined sound quality by a simple operation.

That is, according to the present invention, for example, it is possible to combine an equalizer curve obtained by a conventional equalizer with an equalizer curve that enhances a sound castle that is difficult for a hearing-impaired person to hear, and to make it function by a simple operation. It is an object of the present invention to provide a sound quality correction circuit of an audio device which is enabled.

[0010]

In order to solve the above-mentioned problems, a sound quality correction circuit of an audio apparatus according to the present invention employs the following characteristic configuration.

(1) A first sound quality adjusting means having an equalizer function for adjusting the sound quality by changing a frequency characteristic, and the first sound quality adjusting means are provided separately, so that a hearing impaired person can listen. A second sound quality adjusting means for setting a frequency characteristic for enhancing a difficult sound range;
A sound quality adjusting means for synthesizing both frequency characteristics set by the second sound quality adjusting means and a synthesizing means for generating the synthesized frequency characteristic for sound quality correction. circuit.

(2) The sound quality correction of the audio device according to (1), wherein an equalizer curve, which is a frequency characteristic for enhancing a sound range that is difficult for a hearing-impaired person to listen to, is set in the second sound quality adjusting means in advance. circuit.

(3) The sound quality correcting device according to the above (1), wherein the second sound quality adjusting means can set an equalizer curve for enhancing an arbitrary sound range that is difficult to hear.

(4) The second sound quality adjusting means is operated by an independent switch different from the first sound quality adjusting means, and the sound quality correcting circuit of the audio device according to any one of the above (1) to (3). .

(5) The synthesizing means sets the synthetic characteristic of the most recently set frequency characteristic of the first sound quality adjusting means and the second sound quality adjusting means in the operating state. (4) The sound quality correction circuit of any one of the audio devices.

[0016]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram of a preferred embodiment of a sound quality correcting circuit for an audio device according to the present invention.

FIG. 1 is a block diagram showing a configuration of a typical embodiment of a sound quality correction circuit of an audio apparatus according to the present invention.
FIG. 2 is a perspective view showing a main part of the audio device in the embodiment shown in FIG.

In this embodiment, a sound quality adjustment circuit 100 is provided which executes sound quality correction processing by filter processing having predetermined frequency characteristics in order to obtain a predetermined sound quality desired by a user with respect to an input signal. Is an output signal.

The sound quality correction circuit 100 has a first sound quality adjustment circuit 1 such as a conventional equalizer, and a second sound quality adjustment circuit 2 in which a user can arbitrarily set a frequency characteristic. It has an equalizer operation switch 11 for changing the frequency characteristic of the sound quality adjustment circuit 1 and a specific switch 12 for changing the frequency characteristic of the second sound quality adjustment circuit 2. Further, a frequency characteristic synthesizing circuit 3 for synthesizing frequency characteristics of the first sound quality adjusting circuit 1 and the second sound quality adjusting circuit 2 is provided.

Referring to FIG. 2, audio device housing 2
The equalizer operation switch 11 and a specific switch 12 for adjusting sound quality for the elderly and the like are provided at a position separate from the equalizer operation switch 11 on the front of the device. The specific switch 12 sets, for example, an equalizer curve that enhances a sound range that is difficult for a hearing impaired person such as an elderly person to hear. As one example, an equalizer curve for the elderly is shown in FIG. 3, which enhances the high frequency range, which is a sound range that is difficult to hear.

By operating the specific switch 12, an equalizer power switch 11 such as L0UD or V0CAL can be easily called so as to easily call an equalizer power that enhances a sound range that is difficult for a hearing-impaired person to hear. The specific switch 12 is completely independent of the specific switch 12, and the specific switch 12 is provided at a position which is easily visible as shown in FIG. 3, for example.

Next, the operation of the sound quality correction circuit 100 will be described with reference to the equalizer curve of FIG. When the equalizer curve EQ1 such as LOUD or VOCAL stored in the first sound quality adjustment circuit 1 is called by operating the equalizer operation switch 11, the specific switch 12 is operated to make it difficult for a hearing-impaired person to listen. When the equalizer curve EQ2 is called up, the data of the two equalizer curves EQ1 and EQ2 are synthesized by the frequency characteristic synthesizing circuit 3 to obtain a synthetic equalizer curve EQ3 as shown in the figure.

In this case, the frequency characteristic synthesizing circuit 3 operates the specific switch 12 for calling up an equalizer curve that enhances a sound range that is difficult for a hearing-impaired person to hear from such a state, and the set equalizer is operated. Even if only the curve EQ2 is released, the equalizer curve EQ1 such as LOUD or VOCAL remains called, and the synthesized frequency characteristic follows the equalizer curve EQ1.

Conversely, even if only the equalizer curve EQ1 such as LOUD or VOCAL is operated, the equalizer curve EQ2 that enhances the sound range that is difficult for a hearing-impaired person to hear is still called, and the synthesized frequency characteristic is equalized. It follows EQ2.

As described above, in the sound quality correction circuit 100, the equalizer curve EQ2 for the hearing impaired and the LOUD and VOC are used.
When one or both of the switches 11 and 12 for setting and canceling the equalizer curve EQ1 such as AL are operated, each time the equalizer curves are synthesized and function. That is, the sound quality correction circuit 100 is set with the synthesized characteristics of the frequency characteristics set latest in the first sound quality adjustment circuit 1 and the second sound quality adjustment circuit 2 in the operating state, and the synthesized frequency characteristics are used. Filter processing is performed.

Here, the second sound quality adjustment circuit 2 is designed so that an equalizer carp that enhances a sound range that is difficult for a hearing-impaired person to listen to can be adjusted by himself since hearing impairment varies from person to person.

In the above embodiment, the present invention is not limited to an audio system, but is applicable to, for example, all systems and devices in which sound including a telephone is output from a speaker or the like.

[0028]

As described above, according to the sound quality correction circuit of the audio device of the present invention, the correction is made so that the sound range that is difficult for a hearing-impaired person to hear can be corrected so that the hearing-impaired person can comfortably hear the sound. It is possible. Since the switch for correcting the sound range that is difficult for a hearing-impaired person to listen to is installed in consideration of the operability, the operation is simple, and the listening can be easily and easily performed from usual. As a result, it is possible to set a state in which the hearing-impaired person can easily hear the voice, so that it is not necessary to increase the volume so as to cause discomfort to a nearby person.

Also, since the conventional equalizer such as LOUD and VOCAL and the equalizer for the hearing impaired are installed independently, the equalizer characteristics such as LOUD and VOCAL are changed while the equalizer for the hearing impaired is functioning. This makes it possible to set a desired sound quality while keeping the hearing-impaired person easy to hear.

Further, even when the equalizer for the hearing-impaired person is released when another person operates the equalizer, it is possible to return to a state in which the hearing-impaired person can easily listen again by operating a very simple switch. Can be.

Furthermore, since the equalizer for the hearing impaired person is provided as an independent switch, it can be easily released and the usability can be maintained for healthy persons.

[Brief description of the drawings]

FIG. 1 is a block diagram of a main part configuration showing an embodiment of a sound quality correction circuit of an audio device according to the present invention.

FIG. 2 is a perspective view of a main part of an embodiment of a sound quality correction circuit of the audio device according to the present invention.

FIG. 3 is a diagram illustrating an example of an equalizer curve for the elderly.

FIG. 4 is a sound quality correction circuit 100 according to the embodiment of the present invention.
FIG. 6 is a diagram showing an equalizer curve for explaining the operation of FIG.

FIG. 5 is a diagram illustrating an example of a LOUD position equalizer curve.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 1st sound quality adjustment circuit 2 2nd sound quality adjustment circuit 3 Frequency characteristic synthesis circuit 11 Equalizer operation switch 12 Specific switch 100 Sound quality correction circuit

Claims (5)

[Claims] 1. A first sound quality adjusting means having an equalizer function for adjusting sound quality by changing a frequency characteristic, and the first sound quality adjusting means are provided separately, so that it is difficult for a hearing-impaired person to listen. A second sound quality adjusting means for setting a frequency characteristic for enhancing a sound range, and the two frequency characteristics set by the first sound quality adjusting means and the second sound quality adjusting means are synthesized, and the synthesis for sound quality correction is performed. A sound quality correction circuit for an audio device, comprising: a synthesizing unit that generates a frequency characteristic that has been set. 2. The equalizer curve according to claim 1, wherein an equalizer curve, which is a frequency characteristic for enhancing a sound range that is difficult for a hearing-impaired person to hear, is set in the second sound quality adjusting means in advance. Sound quality correction circuit for audio equipment. 3. The sound quality correcting circuit according to claim 1, wherein said second sound quality adjusting means can set an equalizer curve for enhancing an arbitrary sound range which is hard to hear. 4. The sound quality correcting circuit for an audio device according to claim 1, wherein said second sound quality adjusting means is operated by a switch independent of said first sound quality adjusting means. 5. The method according to claim 1, wherein the synthesizing unit is configured to operate the first unit.
5. The sound quality correcting circuit for an audio device according to claim 1, wherein a synthesis characteristic of a frequency characteristic set latest of said sound quality adjusting means and said second sound quality adjusting means is set.