JP2003125480A - Speaker compensating for environmental variation - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a speaker in which variation in the temperature and/or humidity can be compensated automatically for a variety of speakers. SOLUTION: A player 1 outputting a reproduced signal of a CD and MD selectively has an output connected with the input of a power amplifier 3 through a preamplifier 7. The power amplifier 3 has a high band signal output connected with a tweeter 4 and a low band signal output connected with a woofer 5. The preamplifier 7 is connected with a data storage section 8 and a control compensating for environmental variation is performed based on a control command delivered from a microcomputer 6. Correction data corresponding to variation of humidity in the environment of a speaker is stored at the data storage section 8 and variation in the acoustic characteristics is compensated continuously based on the detected results of a humidity sensor 11.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an "environmental change-compatible speaker device" for correcting a change in acoustic characteristics corresponding to a change in temperature and / or humidity of a speaker installation environment.

[0002]

2. Description of the Related Art Generally, in order to reproduce and emit sound using a speaker device, for example, as shown in FIG. The amplified high frequency component signal is supplied to the tweeter 4, and the low frequency component signal is supplied to the woofer 5.

As another example of constructing a speaker with two ways using the tweeter 4 and the woofer 5, a speaker is constructed with one full range unit, or a speaker is constructed with three or more units. There is.

Since the preamplifier 2 is provided with the functions of a digital signal processor (DSP) and an equalizer (EQ), a flat listening characteristic corresponding to the form of the reproduced signal and the acoustic characteristic of the room in which the speaker device is installed. It can be adjusted so that it becomes, or it can be adjusted to a desired acoustic characteristic.

The sound emission characteristics of the tweeter 4 and woofer 5 units that make up one set of speakers vary depending on the installed environmental temperature and environmental humidity. In order to eliminate such a change, it suffices to use the above-described preamplifier 2 to perform acoustic adjustment so as to cancel the change, but it is very complicated for the user to make such an adjustment each time the environment changes. It is necessary to perform various operations.

[0006]

In the conventional speaker device, when the acoustic characteristics change due to changes in temperature and humidity in the installation environment, it is necessary for the user to manually adjust, but The compensation characteristic corresponding to the change in humidity is very different from the equalizer curve for normal sound quality adjustment, and in order to perform the compensation completely, a graphic equalizer type circuit that can be adjusted up and down at many frequency points must be used. However, after performing the complicated operation to perform the compensation, the sound quality of the source type and the user's preference must be adjusted. In other words, the compensation characteristic by the temperature and humidity is added to the characteristic of the tone control characteristic of the user. Must be adjusted so that it also changes significantly depending on the temperature and humidity. It is of equal status quo in not doing the compensation due.

Therefore, an object of the present invention is to automatically compensate for a change in temperature and / or humidity, and to perform the compensation corresponding to a wide variety of speakers. An object is to provide a speaker device that can cope with environmental changes.

[0008]

In order to solve the above-mentioned problems, the speaker device corresponding to the environmental change according to the present invention adopts a characteristic structure as described below.

(1) A speaker device for environment change that corrects a change in acoustic characteristics corresponding to a change in temperature and / or humidity of a speaker installation environment, the sensor being a sensor for detecting temperature and / or humidity in the speaker installation environment. A data storage unit that stores correction data for correcting a change in acoustic characteristics due to temperature and / or humidity in the speaker installation environment, and correction data stored in the data storage unit. A speaker device capable of responding to environmental changes, comprising: a correction control unit that extracts data corresponding to the installation environment data detected by the sensor unit and corrects the acoustic characteristics of the speaker based on the extracted data.

(2) The correction data in the data storage unit of (1) is data for continuously correcting acoustic characteristic changes due to temperature and / or humidity in the speaker installation environment and corresponds to environmental changes. Speaker device.

(3) The correction data in the data storage unit of (1) is data for correcting the acoustic characteristic change due to temperature and / or humidity in the speaker installation environment in a plurality of stages. Changeable speaker device.

(4) The correction data in the data storage unit of (1) is composed of a data table corresponding to each of a plurality of sets of speakers, and the correction control unit is
Data corresponding to the mounted speaker is extracted from the data table stored in the data storage unit, and the acoustic characteristic of the speaker is corrected based on the extracted data. Speaker device.

(5) The correction data in the data storage section of (1) is composed of a data table corresponding to each of a plurality of speaker units having divided reproduction bands, and the correction control section is A speaker corresponding to an environmental change configured to extract data corresponding to the mounted speaker unit from the data table stored in the data storage unit and correct the acoustic characteristics of the speaker based on the extracted data. apparatus.

(6) A speaker device corresponding to an environmental change, wherein the correction control unit of (1) is configured to perform correction control using a sound quality adjustment unit included in the signal amplification unit.

(7) The speaker installation environment according to any one of the above (1) to (6), which is installed in a vehicle and is adapted to environmental changes.

(8) A speaker device adapted to environmental changes, wherein the sensor section of (7) is composed of a temperature and / or humidity sensor of an air conditioner mounted on a vehicle.

[0017]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described in detail below with reference to the drawings. First, a first embodiment will be described with reference to FIGS. 1 to 5. In the present embodiment, the present invention is applied to an example in which a speaker device is configured as a car audio as shown in FIG. 1 and is connected to an electronic circuit provided in a vehicle via a control signal line L. is there.

As shown in FIG. 1, the circuit configuration is such that the output end of the player 1 for selectively outputting the CD reproduction signal and the MD reproduction signal is connected to the input end of the power amplifier 3 via the preamplifier 7. , The tweeter 4 is connected to the high frequency signal output end of the power amplifier 3, and the woofer 5 is connected to the low frequency signal output end.
Are connected.

Since the preamplifier 7 is provided with the functions of a digital signal processor (DSP) and an equalizer (EQ), a flat listening characteristic corresponding to the form of the reproduced signal and the acoustic characteristic of the room in which the speaker device is installed. It can be adjusted so that it becomes, or it can be adjusted to a desired acoustic characteristic.

A data storage unit 8 is connected to the preamplifier 7 as described above, and control (details described later) corresponding to an environmental change is performed based on a control command from the microcomputer 6. That is,
The data storage unit 8 stores correction data for correcting a change in acoustic characteristic due to temperature and / or humidity in the installation environment of the speaker including the tweeter 4 and the woofer 5, and the correction data includes It is data (details will be described later) for continuously correcting changes in acoustic characteristics due to temperature and / or humidity in the speaker installation environment.

The ECU 9 connected to the microcomputer 6 via the control signal line L is an electronic control unit,
This is for controlling each part of the vehicle, and inputs the respective outputs of the temperature sensor 10 and the humidity sensor 11 which form the sensor part, and also controls the air conditioner controller 12.

From the correction data stored in the data storage unit 8, data corresponding to the installation environment data detected by the sensor unit composed of the temperature sensor 10 and the humidity sensor 11 is taken out, and based on the taken out data. A correction control unit that corrects the acoustic characteristics of the speaker is mainly configured by "the microcomputer 6, the preamplifier 7, and the data storage unit 8".

The state of data storage in the data storage unit 8 is
The correction data corresponds to the following four types of speaker types, first to fourth.

The first speaker type is a speaker type using a paper-based full-range diaphragm, and as shown in FIG. 2, the characteristics of the frequency f and the output P are the standard characteristics a corresponding to the standard humidity. The characteristics shown by the solid line are shown, and the correction characteristics for compensating for the characteristics shown by the solid line are the characteristics shown by the broken line.

The maximum characteristic in the increasing direction of humidity (+ direction) is the high humidity characteristic b with the standard characteristic a as a boundary. The solid line of the high-humidity characteristic b is the humidity change characteristic, and the broken line is the compensation characteristic. The low-frequency side is set so that the standard characteristic a and the high-humidity characteristic b become the respective compensation characteristics as the humidity increases. It is possible to obtain a substantially flat compensated characteristic by gradually decreasing and gradually increasing the high frequency side and continuously changing.

On the other hand, the maximum characteristic in the decreasing direction (-direction) of the humidity is the low humidity characteristic c with the standard characteristic a as the boundary. The solid line of the low-humidity characteristic c is the humidity change characteristic, and the broken line is the compensation characteristic. As the humidity decreases, the standard characteristics a to the low-humidity characteristic c are gradually changed to the compensation characteristics. It is possible to obtain a substantially flat compensated characteristic by increasing the value, gradually decreasing the middle value, and continuously changing the value in the high value side so as to be substantially unchanged.

The second speaker type is a two-way speaker type in which a paper diaphragm is used for the woofer 5 and a soft dome is used for the tweeter 4. As shown in FIG. The characteristic of P is the characteristic of the solid line indicated by the standard characteristic d corresponding to the standard humidity, and the correction characteristic for compensating for the characteristic of this solid line is the characteristic indicated by the broken line.

The maximum characteristic in the increasing direction (+ direction) of humidity is the high humidity characteristic e with the standard characteristic d as a boundary. The solid line of the high humidity characteristic e is the humidity change characteristic, and the broken line is the compensation characteristic, and the low frequency side is set so that each of the standard characteristic d to the high humidity characteristic e becomes the compensation characteristic as the humidity increases. It is possible to obtain a substantially flat compensated characteristic by gradually decreasing and continuously changing so that the middle range is substantially unchanged and the high range side is gradually increased.

On the other hand, the maximum characteristic in the decreasing direction (-direction) of the humidity is the low humidity characteristic f with the standard characteristic d as a boundary. The solid line of the low-humidity characteristic f is the humidity change characteristic, and the broken line is the compensation characteristic. It is possible to obtain a substantially flat compensated characteristic by continuously increasing it by increasing it and making the middle range substantially unchanged and gradually decreasing it on the high range side.

The third speaker type is a two-way speaker type in which a synthetic resin diaphragm such as polypropylene is used for the woofer 5 and a soft dome is used for the tweeter 4, and as shown in FIG. The characteristics of the frequency f and the output P are the characteristics of the solid line shown in the standard characteristics g corresponding to the standard humidity, and the correction characteristics for compensating the characteristics of this solid line are the characteristics shown by the broken lines.

The maximum characteristic in the increasing direction (+ direction) of humidity is the high humidity characteristic h with the standard characteristic g as a boundary. The solid line of the high humidity characteristic h is the humidity change characteristic, and the broken line is the compensation characteristic. The low frequency side is set so that the standard characteristic g and the high humidity characteristic h become the respective compensation characteristics as the humidity increases. It is possible to obtain a substantially flat compensated characteristic by gradually decreasing and continuously changing so that the middle range is substantially unchanged and the high range side is gradually increased.

On the other hand, the maximum characteristic in the decreasing direction of the humidity (-direction) with the standard characteristic g as the boundary is the low humidity characteristic i. The solid line of the low-humidity characteristic i is the humidity change characteristic, and the broken line is the compensation characteristic. As the humidity decreases, each of the standard characteristic g to the low-humidity characteristic i becomes a compensation characteristic. , It is possible to obtain a substantially flat compensated characteristic by continuously changing the high range so as to make a slight change.

The fourth speaker type is a two-way speaker type in which a synthetic resin diaphragm such as polypropylene is used for the woofer 5 and a hard dome is used for the tweeter 4, and as shown in FIG. The characteristics of the frequency f and the output P are the characteristics of the solid line indicated by the standard characteristics j corresponding to the standard humidity, and the correction characteristics for compensating for the characteristics of this solid line are the characteristics indicated by the broken lines.

The maximum characteristic in the increasing direction (+ direction) of humidity is the high humidity characteristic k with the standard characteristic j as a boundary. The solid line of the high-humidity characteristic k is the humidity change characteristic, and the broken line is the compensation characteristic. The low-frequency side is set so that the standard characteristic j to the high-humidity characteristic k become the respective compensation characteristics as the humidity increases. It is possible to obtain a substantially flat compensated characteristic by making a slight decrease, a slight increase in the middle range, and a continuous change so that the high range side becomes substantially unchanged.

On the other hand, the maximum characteristic in the decreasing direction (-direction) of humidity is the low humidity characteristic m with the standard characteristic j as the boundary. The solid line of the low-humidity characteristic m is the humidity change characteristic, and the broken line is the compensation characteristic. It is possible to obtain a substantially flat compensated characteristic by increasing it and continuously changing it so that the middle range is almost unchanged and the high range side is gradually decreased.

In this way, by selecting the data stored in the data storage unit 8 by using switches (not shown) or the like corresponding to the mounted speaker type, the environmental humidity of the mounted speaker follows the change. Humidity compensation can be performed automatically.

In this embodiment, the four types of correction data corresponding to the four speaker formats are stored in the data storage section 8, but it goes without saying that this number can be set to any arbitrary value.

Next, a second embodiment of the present invention will be described with reference to FIGS. 6 to 9. The first embodiment described above continuously corrects in response to changes in humidity, whereas the present embodiment deals with changes in acoustic characteristics due to changes in humidity in a speaker installation environment in multiple stages. This is an example of stepwise correction.

This specific configuration changes the contents of data stored in the data storage unit 8 of the circuit configuration shown in FIG. 1 to change the acoustic characteristics of the speaker constituted by "the microcomputer 6, the preamplifier 7, and the data storage unit 8". The operation of the correction control unit for correction is different, and the others are the same.

That is, the data contents stored in the data storage section 8 are data corresponding to the following four types of speaker formats of first to fourth types.

The first speaker type is a speaker type using a paper-based full-range diaphragm. As shown in FIG. 6, there are five data whose frequency f and output P characteristics correspond to standard humidity. And the standard characteristic A0 corresponding to the standard humidity is the characteristic shown by the solid line,
The correction characteristic for compensating for the characteristic of the solid line is the characteristic shown by the broken line.

In addition to the standard characteristic A0, a first high humidity characteristic A1 and a second high humidity characteristic A2 corresponding to an increase in humidity.
And has the first low humidity characteristic A3 and the second low humidity characteristic A4 corresponding to the decrease. This characteristic has the humidity intermediate point of the characteristic shown in FIG. 2 described above as data, and these five data are selected and used based on the result detected by the humidity sensor 11, and are selected according to the environmental humidity. By performing the correction in stages (five stages), a substantially flat compensated characteristic can be obtained.

The second speaker type is a two-way speaker type in which a paper-type diaphragm is used for the woofer 5 and a soft dome is used for the tweeter 4, and as shown in FIG. The characteristic of P corresponds to standard humidity 5
The standard characteristic B0 corresponding to when the humidity is a standard value is the characteristic shown by the solid line, and the correction characteristic for compensating for the characteristic of this solid line is the characteristic shown by the broken line. ing.

In addition to the standard characteristic B0, a first high humidity characteristic B1 and a second high humidity characteristic B2 corresponding to an increase in humidity.
And has the first low humidity characteristic B3 and the second low humidity characteristic B4 corresponding to the decrease. This characteristic has the humidity middle point of the characteristic shown in FIG. 3 described above as data, and these five data are selected and used based on the result detected by the humidity sensor 11, and are selected according to the environmental humidity. By performing the correction in stages (five stages), a substantially flat compensated characteristic can be obtained.

The third speaker type is a two-way speaker type in which a synthetic resin diaphragm such as polypropylene is used for the woofer 5 and a soft dome is used for the tweeter 4, and as shown in FIG. The characteristics of the frequency f and the output P are five data corresponding to the standard humidity, and the standard characteristic C0 corresponding to the standard humidity is the characteristic shown by the solid line. The correction characteristic for compensating for is the characteristic shown by the broken line.

In addition to the standard characteristic C0, a first high-humidity characteristic C1 and a second high-humidity characteristic C2 corresponding to an increase in humidity.
And has the first low humidity characteristic C3 and the second low humidity characteristic C4 corresponding to the decrease. This characteristic has the humidity intermediate point of the characteristic shown in FIG. 4 described above as data, and these five data are selected and used based on the result detected by the humidity sensor 11, and are selected according to the environmental humidity. By performing the correction in stages (five stages), a substantially flat compensated characteristic can be obtained.

The fourth speaker type is a two-way speaker type in which a synthetic resin diaphragm such as polypropylene is used for the woofer 5 and a hard dome is used for the tweeter 4, and as shown in FIG. The characteristics of the frequency f and the output P are five data corresponding to the standard humidity, and the standard characteristic D0 corresponding to the standard humidity is the characteristic shown by the solid line. The correction characteristic for compensating for is the characteristic shown by the broken line.

In addition to the standard characteristic D0, a first high humidity characteristic D1 and a second high humidity characteristic D2 corresponding to an increase in humidity.
The first low humidity characteristic which has the data of
It has D3 and the second low humidity characteristic D4. This characteristic has the humidity middle point of the characteristic shown in FIG. 5 described above as data, and these five data are selected and used based on the result detected by the humidity sensor 11, and are selected according to the environmental humidity. By performing the correction in stages (five stages), a substantially flat compensated characteristic can be obtained.

In the present embodiment, five correction data corresponding to four speaker formats are stored in the data storage section 8, but it is needless to say that this number can be set to any arbitrary value. Of course, the characteristic data for correcting the humidity change may be set and stored in the unit of a single unit, and the actually used speaker unit may be selected to perform the humidity compensation.

Further, not only when the acoustic characteristics are compensated for the change in the environmental humidity but also when the compensation is performed for the environmental temperature change, the compensation considering both the environmental humidity change and the environmental temperature change is performed. It goes without saying that the present invention can be applied to the case where

[0051]

As is clear from the above description, the speaker device according to the present invention, which is adaptable to the environment change, can be manually operated by the user when the acoustic characteristics change due to the temperature and humidity changes in the installation environment. Since it is possible to automatically compensate for changes in temperature and humidity without making adjustments, the equalizer circuit originally provided for sound quality adjustment can be freely used only for the desired sound quality adjustment. It is possible to improve the usability.

Therefore, when there is a change in temperature and / or humidity, the compensation can be automatically performed, and the compensation can be performed in correspondence with a wide variety of speakers. A device "can be provided.

[Brief description of drawings]

FIG. 1 is a block circuit diagram showing a circuit configuration of a speaker device capable of responding to environmental changes according to a first embodiment of the present invention.

FIG. 2 is a characteristic diagram conceptually showing the contents of data stored in a data storage unit shown in FIG. 1 in the case of a speaker type using a paper-based full-range diaphragm.

FIG. 3 is a conceptual diagram of the contents of data stored in the data storage unit shown in FIG. 1 in the case of a two-way speaker type in which a paper diaphragm is used for the woofer and a soft dome is used for the tweeter. FIG.

FIG. 4 shows a data storage content shown in FIG. 1 in which a synthetic resin diaphragm such as polypropylene is used for the woofer and a soft dome is used for the tweeter.
It is a characteristic view which shows notionally the case of a way speaker type as an example.

FIG. 5 shows the contents of data stored in the data storage unit shown in FIG. 1, in which a synthetic resin diaphragm such as polypropylene is used for the woofer and a hard dome is used for the tweeter.
It is a characteristic view which shows notionally the case of a way speaker type as an example.

FIG. 6 is a conceptual diagram showing an example of a case where a speaker system using a paper-based full-range diaphragm is used to store data stored in a data storage unit included in a speaker device capable of responding to environmental changes according to a second embodiment of the present invention. FIG.

FIG. 7 shows a data storage content in a data storage unit of a speaker device capable of responding to an environmental change according to a second embodiment of the present invention, a paper diaphragm is used for a woofer, and a soft dome is used for a tweeter. FIG. 3 is a characteristic diagram conceptually showing a case of a two-way speaker type as an example.

FIG. 8 shows the contents of data stored in a data storage unit of a speaker device that can cope with environmental changes according to the second embodiment of the present invention, in which a woofer is made of a synthetic resin diaphragm such as polypropylene and a tweeter is made of software. FIG. 3 is a characteristic diagram conceptually showing a case of a two-way speaker type using a dome as an example.

FIG. 9 shows a data storage content in a data storage section of a speaker device capable of responding to an environmental change according to a second embodiment of the present invention. FIG. 3 is a characteristic diagram conceptually showing a case of a two-way speaker type using a dome as an example.

FIG. 10 is a block circuit diagram showing a circuit configuration of an example of a conventional speaker device that copes with an environmental change.

[Explanation of symbols]

1 player 2 preamplifier 3 power amplifier 4 Tweeters 5 woofer 6 microcomputer 7 preamplifier 8 data storage 9 ECU 10 Temperature sensor 11 Humidity sensor 12 Air conditioner controller

Claims (8)

[Claims] 1. A speaker device for environment change, which corrects a change in acoustic characteristic corresponding to a change in temperature and / or humidity of a speaker installation environment, the sensor unit detecting temperature and / or humidity in the speaker installation environment. A data storage unit that stores correction data for correcting a change in acoustic characteristics due to temperature and / or humidity in the speaker installation environment, and among the correction data stored in the data storage unit,
A speaker device corresponding to an environmental change, comprising: a correction control unit that extracts data corresponding to the installation environment data detected by the sensor unit and corrects the acoustic characteristics of the speaker based on the extracted data. . 2. The correction data in the data storage unit is data for continuously correcting a change in acoustic characteristics due to temperature and / or humidity in the speaker installation environment. A speaker device corresponding to the described environmental change. 3. The correction data in the data storage unit is data for correcting acoustic characteristic changes due to temperature and / or humidity in the speaker installation environment in a plurality of stages. Item 1. A speaker device compatible with environmental changes according to item 1. 4. The correction data in the data storage unit comprises a data table corresponding to each of a plurality of sets of speakers, and the correction control unit selects from among the data tables stored in the data storage unit. 2. The speaker device according to claim 1, wherein data corresponding to the mounted speaker is taken out, and the acoustic characteristic of the speaker is corrected based on the taken out data. . 5. The correction data in the data storage section is composed of a data table corresponding to each of a plurality of speaker units having a divided reproduction band, and the correction control section is stored in the data storage section. The data corresponding to the mounted speaker unit is extracted from the extracted data table, and the acoustic characteristic of the speaker is corrected based on the extracted data. Speaker device that adapts to changes in the environment. 6. The speaker device according to claim 1, wherein the correction control unit is configured to perform correction control using a sound quality adjustment unit included in a signal amplification unit. 7. The speaker device according to any one of claims 1 to 6, wherein the speaker installation environment is installed in a vehicle. 8. The speaker device according to claim 7, wherein the sensor unit is composed of a temperature and / or humidity sensor of an air conditioner mounted on a vehicle.