JP3142262B2 - Emergency call device and emergency call system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is mounted on a vehicle such as an automobile, and in the event of an emergency such as a traffic accident or sudden illness, the current position information and registration of a vehicle are registered at a center having jurisdiction over an emergency call system such as a police or emergency call center. For emergency call devices that transmit data from vehicles, etc., in particular, for hands-free voice calls during emergency call notification, the volume level of voice signals from the center that controls the emergency call system is controlled, and hands-free calls for emergency calls are made. The present invention relates to an emergency notification device that enables a sound received from an emergency notification center to be reliably sounded by controlling a volume level of a call to be equal to or higher than a certain level.

[0002]

2. Description of the Related Art Conventionally, an emergency call, which is mounted on a vehicle such as an automobile and performs a telephone call processing to a center having jurisdiction over an emergency call system such as a police station or an emergency call center via a base station of a communication carrier. 2. Description of the Related Art An emergency call system terminal device provided with a communication unit is known. There is also known an emergency call system terminal device equipped with a hands-free system so that a two-way voice call can be made between the emergency call center and the emergency call system terminal device when an emergency call is reported.

[0003]

However, the conventional emergency call system terminal equipment is used for a center that has jurisdiction over an emergency call system, such as a police station or an emergency call center, and an occupant of a vehicle equipped with the emergency call system terminal equipment or an accident site. When making a hands-free call with a user, such as a person, the received voice can be freely changed by the user, so the user has already adjusted the volume and set the received volume attenuation to the maximum. However, if the reception volume attenuation is maximized due to an erroneous operation or the like, there is a problem that the voice received from the center in charge of the emergency notification system is not transmitted to the user at the time of the emergency notification.

[0004] The present invention is to solve such a problem in the prior art. In a hands-free voice call at the time of emergency call notification, the sound received from the center responsible for the emergency call system is reliably sounded. It is an object of the present invention to provide an emergency call device and an emergency call system that can be made to perform an emergency call.

[0005]

In order to solve the above problems, the present invention provides a speaker for outputting a voice signal received from a center having jurisdiction over an emergency call system in a hands-free voice call at the time of emergency call notification. It is equipped with a volume control circuit that controls the volume level to a certain level or higher.When an emergency call is made, the sound received from the emergency call center can be reliably sounded, and both voices can be sent to and from the emergency call center. Calls can be made.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention described in claim 1 of the present invention is a hand-held telephone for making a voice call via a microphone and a speaker.
Lee call means and emergency call system for emergency call
Between the center that has jurisdiction over the emergency and the emergency call system terminal equipment
As well as send and receive voice signal in, except when the emergency contact
Is a transmitter / receiver that transmits / receives audio signals to / from other than the center
And transmitting the audio signal received by the transmitting / receiving means to the switch.
Sounding means for sounding from a peaker and at the time of the emergency call
The controls the volume level of the speaker to a predetermined level, before according to the operation except when emergency call contact
This is an emergency call device equipped with a volume control circuit that changes the recording level. When an emergency call is made, the sound received from the emergency call center can be sounded reliably, and the Has the effect that two-way voice communication can be performed.

[0007] The invention according to claim 2 of the present invention, the sound <br/> amount control circuit of the speaker when the emergency call connection after controlling the volume level to a predetermined level, the volume level by the user an emergency call device according to claim 1, wherein the prohibiting changes the volume level of the speaker in advance predetermined
Since it is set to level, such an action can not change the volume level by the user, at the time of emergency call connection, it is possible to reliably sounding the received audio from the emergency call center.

[0008] The invention according to claim 3 of the present invention, the sound <br/> amount control circuit of the speaker when the emergency call connection after controlling the volume level to a predetermined level, the volume level by the user 2. The emergency notification device according to claim 1, further comprising: means for enabling the change, and means for preventing the changed volume level from becoming equal to or more than a predetermined value or equal to or less than a predetermined value. even if you make a mistake, such as to maximize, at the time of emergency contact, the volume level of the speaker is given
, The sound received from the emergency call center can be reliably sounded. Further, the user can arbitrarily adjust the volume level even after the volume level of the speaker is controlled to the predetermined level at the time of the emergency call notification, but can automatically control the adjusted volume level so as not to be too large or too small. It has the action of:

[0009] The invention according to claim 4 of the present invention, the sound <br/> amount control circuit, and controlling the volume level of the speaker in response to an external noise input from the microphone The emergency notification device according to any one of claims 1 to 3, wherein the predetermined volume level controlled by the volume control circuit is adjusted according to the level of external noise at the time of the emergency notification notification. At the time of the communication, there is an effect that the voice received from the emergency call center can be sounded at the optimum volume level.

[0010] The invention described in claim 5 of the present invention, the sound <br/> amount control circuit, based on the volume level control signal transmitted from said center <br/> over which jurisdiction over the emergency call system The emergency notification device according to any one of claims 1 to 4 , wherein a volume level of the speaker is controlled, and a predetermined volume level controlled by a volume control circuit is set to a center. Since the adjustment is performed based on the volume level control signal from the emergency notification center, there is an effect that the voice received from the emergency notification center can be sounded at the optimum volume level at the time of the emergency notification communication.

According to a sixth aspect of the present invention, a voice signal is transmitted and received between the emergency notification device according to any one of the first to fifth aspects and the emergency notification device at the time of emergency notification. This is an emergency call system including a center, and has the effect of constructing an emergency call system capable of reliably performing both voice calls between the center and the emergency call system terminal device at the time of emergency call notification.

[0012] Next, detailed description of the embodiments of the present invention with reference to the drawings. Embodiment 1 FIG. 1 is a block diagram showing a configuration of an emergency call system terminal device according to a first embodiment of the present invention. In FIG. 1, reference numeral 1 denotes an emergency call system terminal device, which is mounted on a vehicle such as an automobile, and is used by a police, an emergency call center, etc., which is responsible for the emergency call system, in the event of an emergency such as a traffic accident or sudden illness. Transmit data such as location information and registered vehicles. 2 performs a process of transmitting a signal transmitted from the emergency call communication means 11 to the base station of the communication carrier, and transmits a signal received from the communication carrier to the emergency call communication means 1.
1 is a communication antenna output to 1, 3 is a user
Emergency call button that generates a signal to start calling process in emergency such as sudden illness, 4 is a GPS antenna that receives data from satellites, 5 is a user transmission when making a hands-free call A microphone for inputting an audio signal, and a speaker 6 for sounding a received audio signal from a center that controls the emergency call system such as a police station or an emergency call center when making a hands-free call.

In the emergency call system terminal device 1, 1
Reference numeral 1 denotes an emergency call communication means, which responds to a call request signal from the control unit 12 by using a telephone number input from the control unit 12 via a base station or the like of a communication carrier to a communication partner corresponding to the telephone number. When the call originating process is started and a call response from the other party or a signal such as a busy signal, etc., during the call is received, it is recognized that the call has shifted to the call state, and the control shifts to voice call control or data communication control. At the same time, a signal indicating that the call has been transferred to the telephone is output to the control unit 12, and
Data such as the traveling direction and direction of the vehicle, and data such as location information are transferred to the emergency call system such as the police or emergency call center corresponding to the telephone number corresponding to the telephone number via the carrier's base station. Perform processing to send to the center where the information is sent.

Reference numeral 12 denotes a control unit, which recognizes that an emergency call request has been made based on an operation signal from the emergency call transmission button 3, and sends a current position to the position information acquisition processing unit 14 in order to start an emergency call process. Along with outputting a signal requesting information, the information such as the traveling direction and direction of the vehicle, and data such as position information are input from the position information acquisition processing unit 14,
Furthermore, the telephone number of the center that has jurisdiction over the emergency call system, such as the police and the emergency call center, is obtained from the storage unit 15, and the emergency call communication unit 11 is used using the telephone number.
Request to make a phone call to emergency call notification means 1
When a call response from a call partner corresponding to the telephone number or a signal for shifting to a call, such as a busy signal, is received from 1, it is recognized that the call has shifted to a call state and obtained from the position information acquisition processing unit 14. Data such as the traveling direction and direction of the vehicle, and data such as position information are transferred to the emergency call system such as the police or emergency call center corresponding to the telephone number corresponding to the telephone number via the carrier's base station etc. A process for outputting a signal to be transmitted to the emergency center to the emergency call communication means 11 is performed.

Reference numeral 13 denotes a gyro sensor, which generates information such as a traveling direction and a direction of the vehicle, and obtains a position information acquisition processing unit 1.
4 outputs information such as the traveling direction and direction of the vehicle. 14
Is a position information acquisition processing unit, which inputs data from a gyro sensor 13 for generating information such as the traveling direction and direction of the vehicle in response to a position information request signal from the control unit 12, and the GPS receiver 17 Input data such as position information generated from data received from the antenna 4,
Further, a process of outputting data such as the traveling direction and direction of the vehicle input from the gyro sensor 13 and data such as position information input from the GPS receiver 17 to the control unit 12 is performed.

Reference numeral 15 denotes a storage unit which stores information such as a telephone number of a center that controls the emergency call system such as a police station and an emergency call center, a registration number of a vehicle equipped with the emergency call system terminal device 1, and a registrant. At the same time, in response to a request signal from the control unit 12, the telephone number of the corresponding center that controls the emergency call system such as the police or emergency call center, the registration number of the vehicle equipped with the emergency call system terminal device 1, and the registrant Perform processing to output information such as.

Reference numeral 16 denotes a hands-free system, which performs processing including echo cancellation and gain control in order to perform a hands-free call between a user and a center that controls the emergency call system, such as a police station or an emergency call center. Reference numeral 17 denotes a GPS receiver, and a GPS antenna 4
18A is a volume control circuit that performs processing of outputting data such as position information to the position information acquisition processing unit 14 from data input from the center, and a center that controls the emergency call system in a hands-free call at the time of emergency call notification. The audio signal received from the speaker 6 is always set at a constant level.
Perform processing to output to.

Next, the operation of the first embodiment. In FIG. 1, the user presses the emergency call button 3 in an emergency such as a traffic accident or sudden illness. The emergency call transmission button 3 outputs to the control unit 12 a signal indicating that the button has been pressed by a user's pressing operation. The control unit 12 recognizes that there has been an emergency call request from the operation signal from the emergency call transmission button 3 and starts the emergency call process. Control unit 12
Outputs a signal requesting the current position information to the position information acquisition processing unit 14. The position information acquisition processing unit 14 responds to the position information request signal from the control unit 12,
In addition to inputting data from the gyro sensor 13 that generates information such as orientation, data such as position information generated from data received by the GPS receiver 17 from the GPS antenna 4 is input. The position information acquisition processing unit 14 outputs to the control unit 12 data such as the traveling direction and direction of the vehicle input from the gyro sensor 13 and data such as position information input from the GPS receiver 17. The control unit 12 obtains the telephone number of the center that controls the emergency call system such as the police and the emergency call center from the storage unit 15, and requests the emergency call communication unit 11 to make a call using the telephone number. Emergency call notification means 11 uses telephone antenna 2 to start a telephone call process to the other party corresponding to the telephone number via the base station of the communication carrier.

When receiving an outgoing call response from a call partner or a signal such as a busy signal that shifts to a busy state, the emergency call notification unit 11 recognizes that the state has shifted to a talking state, and performs voice call control or data communication. At the same time, the control section 12 sends a signal notifying that the control has been transferred during the call.
Output to The control unit 12 determines that the call is successful,
The traveling direction of the vehicle obtained from the position information acquisition processing unit 14,
Transmits information such as direction and data such as location information to the center responsible for the emergency call system such as the police or emergency call center corresponding to the telephone number via the carrier's base station, etc. Perform processing.

[0020] After the end of the emergency call originating process, to run the voice call between the center and the user that has jurisdiction over the emergency call system. In the case of a voice call, a voice signal received from a center having jurisdiction over the emergency call system is transmitted to the emergency call communication means 11.
Is output to the hands-free system 16 via the. The hands-free system 16 performs signal processing such as howling control and echo cancellation control on the received audio signal and outputs the signal to the volume control circuit 18A. The volume control circuit 18A sets the volume level of the received voice signal output from the hands-free system 16 to a constant level and outputs the signal from the speaker 6. In addition, the transmission audio signal is transmitted from the microphone 5 to the user's voice.
The microphone 5 converts the voice from the user into a transmission voice signal and outputs the signal to the hands-free system 16. In the hands-free system 16, signal processing such as howling control and echo cancellation control is performed on the received voice signal, and the signal is output to a center that controls the emergency notification system via the emergency notification communication unit 11.

[0021] Thus, according to the first embodiment, the volume control circuit 18A is set the volume level of the speaker 6 at a constant level, it is prohibited to change the volume level by the user, the emergency call connection At times, the sound received from the emergency call center can be reliably sounded.

[0022] Second Embodiment FIG. 2 is a block diagram showing the configuration of the emergency call system terminal device in the second embodiment of the present invention. The second embodiment is different from the first embodiment shown in FIG. 1 in that a volume control button 19 for enabling a user to arbitrarily adjust a volume level output from speaker 6 is provided. The volume control circuit 18B is configured to control the volume level output from the speaker 6 to a constant level when an emergency notification is made by the emergency notification unit 11. The volume adjustment button 19 may be a volume adjustment dial or a volume adjustment switch. The volume control circuit 18 </ b> B adjusts the volume level currently set by the volume adjustment button 19 or the volume level output from the speaker 6 according to the volume adjustment amount set by the volume adjustment button 19 and stored in the storage unit 15. During the emergency notification by the emergency notification means 11, the volume level output from the speaker 6 is controlled to be constant based on the emergency notification request from the control unit 12. Therefore, even when the user performs an erroneous operation such as maximizing the volume amplification amount or the volume attenuation amount of the volume adjustment button 19, the volume control circuit 18B makes it easy for the user to hear the volume level during an emergency call. Since the control for returning to a certain level is performed, the sound received from the emergency call center can be reliably sounded. Further, even after the volume control circuit 18B performs control to return the volume level to a certain level, the user can adjust the volume level to the optimum volume level for the user by adjusting the volume adjustment button 19. . This is because the optimal volume level differs depending on the individual difference of the user. The volume control circuit 18B may be provided with a means for preventing the volume level from becoming inappropriately large or small when the user re-adjusts the volume level. This is because the control unit 12 monitors the resistance change or the voltage change due to the adjustment of the volume adjustment button 19, and when the change is equal to or more than a certain level or equal to or less than the certain level, a signal for inhibiting the volume adjustment is sent to the volume control circuit 18B. Achieved by output.

[0023] Thus, according to the second embodiment, emergency call and volume control circuit 18B for controlling the volume level of the speaker at a constant level during communication, volume adjustment button that allows to change the volume level by the user Even if the user performs an erroneous operation such as maximizing the volume attenuation, the volume level of the speaker can be controlled to a constant level at the time of the emergency call, so that the emergency call center Can be reliably sounded.
In addition, the user can adjust the volume level of the speaker to an optimal volume level even after the volume level of the speaker is controlled to a certain level at the time of the emergency report, and the adjusted volume level is too large or too small. It can be automatically controlled not to.

[0024] (Embodiment 3) FIG. 3 is a block diagram showing the configuration of the emergency call system terminal equipment according to a third embodiment of the present invention. The third embodiment differs from the first embodiment shown in FIG. 1 in that a volume control circuit 18C for controlling the volume level output from speaker 6 according to external noise input from microphone 5
It is to have. In the control unit 12, the control unit 12
The level of external noise input from the microphone 5 is confirmed using an AD converter or the like provided inside the device. When shifting to the emergency call notification operation such as when the emergency call transmission button 3 is pressed, the control unit 12 sends a signal to the volume control circuit 18C based on the external noise level input from the microphone 5 when the external noise level is large. Outputs a control signal for further increasing the volume level, and the volume control circuit 18C performs adjustment to increase the set level of the received voice signal based on the control signal, and outputs the signal to the speaker 6.

[0025] Thus, according to the third embodiment, the volume control circuit 1 for controlling the volume level of the speaker at the time of emergency call connection in response to an external noise level which is input to the microphone 5
8C, it is possible to control the volume to a level that is easy for the user to listen to even if the external noise is so loud that the sound from the speaker 6 is difficult to hear, and the sound received from the emergency call center is reliably sounded. You can make it sound.

The third embodiment can also be applied to the second embodiment shown in FIG. 2, and includes a volume control circuit for controlling the volume level of the speaker to a constant level when an emergency call is made, A volume control button that allows the user to change the volume level. Even if the user performs an erroneous operation such as maximizing the volume attenuation, the volume control circuit is controlled by the volume control circuit when an emergency call is made. Can be controlled to an appropriate level in consideration of the magnitude of the external noise level, and the sound received from the emergency call center can be sounded reliably. In addition, the user can adjust the volume level of the speaker to the optimum volume level for the user even after the volume level of the speaker is controlled according to the external noise level at the time of the emergency call notification. Automatic control can be performed so as not to be too small.

[0027] (Fourth Embodiment) FIG. 4 is a block diagram showing the configuration of the emergency call system terminal apparatus according to the fourth embodiment of the present invention. Embodiment 4 is different from Embodiment 1 shown in FIG. 1 in that the volume level output from speaker 6 is controlled based on a volume control signal sent from a center that controls the emergency notification system. It is provided with a volume control circuit 18D and a volume control signal extraction unit 20 for extracting a volume control signal sent from the center. In the case of transition to the emergency call notification operation such as pressing of the emergency call transmission button 3, the center having jurisdiction over the emergency call system changes the received voice signal level of the emergency call system terminal 1 to the emergency call system terminal 1. A control signal including a volume control signal to be adjusted is output. When the control signal including the volume control signal is input to the emergency notification communication unit 11 via the communication antenna 2, the volume control signal extraction unit 20 extracts the volume control signal and outputs the signal to the control unit 12. The control unit 12 includes a volume control circuit 18D
And outputs a control signal for adjusting the volume to a volume based on the volume control signal. The volume control circuit 18 </ b> D adjusts the level of the received audio signal according to the set volume and outputs it to the speaker 6.

[0028] Thus, according to the fourth embodiment, the volume control circuit 18D for controlling the volume level of the speaker 6 based on the volume control signal sent from the center that has jurisdiction over the emergency call system when the emergency call connection And a volume control signal extraction unit 20 for extracting a volume control signal sent from the center, so that when an emergency call is made, the volume is controlled to a level that is easy for the user to listen to without any operation by the user. And the sound received from the emergency call center can be reliably sounded.

The fourth embodiment can also be applied to the second embodiment shown in FIG. 2, and includes a volume control circuit for controlling the volume level of the speaker to a constant level when an emergency call is made, A volume control button that allows the user to change the volume level. Even if the user performs an erroneous operation such as maximizing the volume attenuation, the volume control circuit is controlled by the volume control circuit when an emergency call is made. Can be properly controlled based on the volume control signal sent from the center that controls the emergency call system, and the sound received from the emergency call center can be reliably sounded. In addition, the user can adjust the volume level of the speaker to the optimum volume level for the user even after the volume level of the speaker is properly controlled based on the volume control signal sent from the center at the time of the emergency call notification. Automatic control can be performed so that the adjusted volume level is not too high or too low.

[0030] Embodiment 5 FIG. 5 is a block diagram showing the configuration of the emergency call system terminal apparatus in the fifth embodiment of the present invention. The fifth embodiment is different from the first embodiment shown in FIG. 1 in that a volume level output from speaker 6 is determined based on a volume control signal from an external device connected via external device connection interface 21. That is, a volume control circuit 18E for controlling the sound pressure is provided. A volume control signal for adjusting the reception volume level is input from the external device to the control unit 12 via the external device connection interface 21. In a case where the operation has shifted to an emergency call notification operation such as pressing of the emergency call transmission button 3, the control unit 12 sends a received sound volume level input from an external device via the external device connection interface 21 to the volume control circuit 18 E. A control signal for adjusting the sound volume based on the control signal for adjustment is output. The volume control circuit 18E adjusts the set level of the received audio signal according to the set volume, and
Output to

[0031] Thus, according to the fifth embodiment, when the emergency call connection, the external apparatus connection interface 21
Volume control circuit 1 that controls the volume level of speaker 6 based on a volume control signal from an external device connected via
8E, it is possible to control the volume level so that the user can easily listen to it without any operation by the user when contacting the emergency call, and to make sure that the sound received from the emergency call center is sounded. Can be.

The fifth embodiment can also be applied to the second embodiment shown in FIG. 2, and includes a volume control circuit for controlling the volume level of the speaker to a constant level when an emergency call is made, A volume control button that allows the user to change the volume level. Even if the user performs an erroneous operation such as maximizing the volume attenuation, the volume control circuit is controlled by the volume control circuit when an emergency call is made. Can be appropriately controlled based on a volume control signal from an external device, and the sound received from the emergency call center can be reliably sounded. In addition, the user can adjust the volume level of the speaker to the optimum volume level for the user even after the volume level of the speaker is appropriately controlled based on the volume control signal from the external device at the time of the emergency call notification. Automatic control can be performed so that the volume level is not too high or too low.

In the fifth embodiment, as a communication signal for inputting a volume control signal for adjusting a received audio signal level from an external device, a synchronous signal such as an asynchronous serial signal, a frame signal, or a clock signal is used. Synchronous serial signals using signals, parallel signals such as bus communication signals, LAN communication signals such as IE-BUS and ARCNET that can communicate with multiple devices over a network, infrared signals and wireless signals that do not require wires Can be used.

[0034]

As is apparent from the above description, the present invention
According to the emergency notification device , it is installed on the vehicle and transmits the current vehicle position information and data such as registered vehicles to the police, emergency notification center, and other centers that control the emergency notification system in the event of an emergency such as a traffic accident or sudden illness In addition, since the emergency notification system terminal device that makes a hands-free call with the center has a volume control circuit that controls the volume level of the speaker that outputs the audio signal received from the center to a certain level or more, the emergency At the time of the report communication, the sound received from the emergency report center can be reliably sounded, and the two-way voice communication with the emergency report center can be reliably performed.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of an emergency call system terminal device according to Embodiment 1 of the present invention.

FIG. 2 is a block diagram showing a configuration of an emergency call system terminal device according to Embodiment 2 of the present invention.

FIG. 3 is a block diagram showing a configuration of an emergency call system terminal device according to Embodiment 3 of the present invention.

FIG. 4 is a block diagram showing a configuration of an emergency call system terminal device according to a fourth embodiment of the present invention.

FIG. 5 is a block diagram showing a configuration of an emergency call system terminal device according to a fifth embodiment of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Emergency call system terminal equipment 2 Communication antenna 3 Emergency call transmission button 4 GPS antenna 5 Microphone 6 Speaker 11 Emergency call communication means 12 Control unit 13 Gyro sensor 14 Position information acquisition processing unit 15 Storage unit 16 Hands-free system 17 GPS receiver 18A , 18B, 18C, 18D, 18E Volume control circuit 19 Volume control button 20 Volume control signal extractor 21 External device connection interface

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-9-247244 (JP, A) JP-A-9-107585 (JP, A) Japanese Utility Model Application No. 58-15293 (JP, U) Japanese Utility Model Application No. Sho 62- 193347 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) G08B 25/08 G08B 25/10 B60R 9/00-11/06 H04M 1/00-11/04 H04B 7/24

Claims (6)

(57) [Claims] A voice call is made via a microphone and a speaker.
Hands-free calling means and emergency call
Center responsible for reporting system and emergency reporting system terminal
Sends and receives audio signals to and from the device and makes emergency calls
Send and receive voice signals with other than the above center except when contacting
Transmitting and receiving means, and the audio signal received by the transmitting and receiving means.
Sounding means for sounding a signal from the speaker;
At the time of reporting, the volume level of the speaker is set to a predetermined level.
Controls to the bell, the operation except when emergency contact
Emergency call device and a volume control circuit in which the volume level is changed in accordance with. 2. The system according to claim 1, wherein said volume control circuit is adapted to transmit an emergency call.
And control the volume level of the speaker to a predetermined level
Later, prohibit the user from changing the volume level.
The emergency notification device according to claim 1, wherein 3. The volume control circuit according to claim 1, further comprising :
After controlling the volume level of the speaker at a predetermined level, and means for enabling a change in volume level by the user, and means for preventing the change loudness level falls below a predetermined value or more or a predetermined value The emergency call device according to claim 1, further comprising: Wherein said volume control circuit, in response to external noise input from the microphone and controls the volume level of the speaker claims 1 to 3 Neu
The emergency call device described in any of them. Wherein said volume control circuit, based on the volume level control signal transmitted from said center having jurisdiction over the emergency call system, according to claim 1 to claim, characterized in that to control the volume level of the speaker 4. The emergency notification device according to any one of 4 . 6. A emergency call device according to any one of claims 1 to 5, the emergency call including the center for transmitting and receiving audio signals to and from the emergency notification device <br/> during emergency call contact system.