JP2012068580A - Sound masking device using vibration speaker - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sound masking device using a vibration speaker which outputs voice guidance from a frame of a painting or a glass case housing a sculpture, in addition to visual information such as the painting, the sculpture, or video without affecting a surrounding environment and other shops and advertisements.SOLUTION: A sound masking device using a vibration speaker 10 is a sound device 50 which transmits voice to only persons in a specific area and comprises: the vibration speaker 10 which outputs sound with an attached window pane, a panel or the like serving as a vibrating body 60; a sound collector 30 which collects peripheral sound; and a control amplifier 20 which includes a recording medium 25 having a plurality of voice guidances recorded therein, a sensor 28 for sensing the approach of a person, and a phase inverter 21 for inverting a phase of sound and is connected to a computer 40 by a network. The plurality of voice guidances recorded in the recording medium 25 are selectively outputted in response to a detection signal of the sensor 28.

Description

  The present invention relates to an acoustic device that can hear a voice guide only by a person in a specific region, and relates to an acoustic masking device using a directional vibration speaker that uses a mounted panel or the like as a diaphragm.

  Traditionally, at exhibitions held at museums, museums, event venues, department stores, etc., explanations of exhibited works or venue guidance were text information by brochures or explanations by curators and staff, Due to the development of communication technology, voice guides using portable terminals with earphones rented out at the entrance of the exhibition hall have come to be used.

  For example, as shown in FIG. 5A, an automatic video / audio guide device disclosed in Patent Document 1 includes an audio guidance mobile terminal 100 including a recording medium 120 in which audio guide information for explanation is recorded. The facility prepares in advance, lends this portable terminal 100 to the visitors when entering, and automatically detects the remote control device 130 installed in the vicinity of the exhibition work shown in FIG. 5B or in a predetermined place. The mobile terminal 100 reproduces the voice guide, and a procedure for collecting the mobile terminal 100 when leaving the building is performed.

  In addition, due to the rapid development of mobile phones in recent years, a wide range of communication methods have been adopted in which mobile phones owned by individuals are connected to the network as mobile terminals and guide information on exhibits etc. is acquired according to the wireless communication environment of facilities such as museums. There has been disclosed a guide system that enables guidance by appropriately switching to wireless communication or wireless LAN communication (see, for example, Patent Document 2).

Utility Model Registration No. 3015155 JP 2006-217508 A

  However, depending on the location of signboards and displays, when broadcasting using conventional speakers, there is a problem that the sound is reverberating and affects surrounding stores and other advertisements.

  In addition, since there is a need to ask the store clerk about products lined up in the store's showroom, there is a problem that it is difficult to ask if there is no intention to purchase.

  In the case of exhibitions at museums and art galleries, in order to listen to explanations of works, it is necessary to rent a mobile terminal with earphones and go around the exhibition room in advance. However, each time an exhibit is changed, it is necessary to rewrite data in a recording medium such as a dedicated voice guide memory containing voice data of the voice guide, which is very complicated.

  Further, in a guide system using a mobile phone, it is necessary to always keep the mobile phone owned by an individual in a talking state.

  The present invention focuses on the above problems, and does not affect the surrounding environment and other stores and advertisements, and is added to visual information such as paintings and statues and images, and by voice. An object of the present invention is to provide an acoustic masking device using a vibration speaker that can provide an audio guide from a picture frame or a stored glass case that does not require a portable terminal when performing guidance.

  In order to achieve the above-mentioned object, the present invention has the following configurations (1) to (3).

  (1) An acoustic device that transmits sound only to a person in a specific area, and has a vibration speaker having a function of generating sound using the attached window glass, glass case, panel, table, and frame as a vibrating body, and the surroundings A sound collecting device that collects the sound of the sound, a recording medium on which a plurality of voice guides are recorded, a sensor that detects the approach of a person, and a phase inverter that reverses the phase of the sound, A vibration speaker comprising: a connected control amplifier, wherein the plurality of voice guides recorded on the recording medium of the control amplifier are selectively output from the vibration speaker by a detection signal of the sensor. Acoustic masking device using

  (2) The acoustic masking device using the vibration speaker according to (1), wherein the plurality of voice guides recorded on the recording medium is changed by the computer via the network.

  (3) The control amplifier inverts the phase of the sound collected by the sound collector through the phase inverter, synthesizes it with the voice guide, and outputs the synthesized sound from the vibration speaker. An acoustic masking device using the vibration speaker according to (1) or (2).

  According to the present invention, by attaching a vibration speaker to an advertisement, a signboard, a front panel of a digital signage (electronic signage), etc., works such as paintings and statues without affecting the surrounding environment and other stores and advertisements It is possible to provide an acoustic masking device using a vibration speaker that can provide guidance and work introduction with directional voice in addition to visual information such as advertisement videos.

  Providing an acoustic masking device that uses a vibration speaker that can make the car more appealing by providing voice guidance that informs the performance of the car from the car body if vibration speakers are installed on the car windows and bonnets on display. be able to.

  In addition, by installing vibration speakers in glass windows and department store display windows in museums and galleries, people can guide products displayed only to people who are standing in front of the display cases or show windows. It is possible to provide an acoustic masking device using a vibration speaker that can transmit at a volume that can be spoken.

  Also, when sitting at a table in a self-service restaurant or cafe and waiting for an ordered item, it is possible to detect the reservation tag and give a voice guidance from the vibration speaker installed on the table that the customer's ordered item has come to the counter An acoustic masking apparatus using a simple vibration speaker can be provided.

  In addition, by installing vibration speakers directly on replicas, characters, and other objects in stores, museums, theme parks, etc., it is possible to convey facility information and product explanations by voice using objects. An acoustic masking apparatus using a simple vibration speaker can be provided. Or by installing vibration speakers on the table space under an umbrella set up in an open cafe in the city, or on the wall or ceiling panel of a space surrounded by a crowd such as a hall of a station, An acoustic masking device using a vibration speaker that functions as a noise canceller that emits sound from a wall or ceiling panel and changes the table space under the umbrella or the entire hall into a quiet space can be provided.

(A) The block diagram of the acoustic masking apparatus using the vibration speaker which concerns on a present Example, (b) The acoustic masking apparatus using the vibration speaker Diagram showing the effect of acoustic masking Diagram showing the effect of noise canceller The figure which shows the example which combined the effect of acoustic masking and noise canceller The figure which shows the function of the conventional portable audio guidance apparatus

  Hereinafter, the form for implementing this invention is demonstrated in detail by an Example.

  FIG. 1A is a diagram illustrating a configuration of an acoustic masking device 50 using the vibration speaker 10 according to the present embodiment. The vibration speaker 10 and the control amplifier 20 that use a window glass, a panel, a frame, or the like as the vibration body 60 are illustrated. And a sound collecting device 30 connected by wire or wirelessly.

  The vibration speaker 10 includes a vibration element 10a formed of an electromagnetic element, a piezoelectric element, or the like that converts an electric signal output from the control amplifier 20 into vibration and vibrates the attached vibration body 60 to generate sound. It is a device that uses installed windows and panels as speakers that emit sound.

  When attaching to a window glass or panel, etc., the sound generated from the window glass or panel when the installation surface of the window glass or panel is a flat surface is suppressed by bonding and fixing with a strong double-sided adhesive tape 8 etc. Since the sound is output evenly and horizontally without spreading and becomes a highly directional sound, the effect of acoustic masking acting as a mass of sound stronger than the surrounding noise can be exhibited.

  From the block diagram of the acoustic masking device 50 using the vibration speaker 10 shown in FIG. 1B, the control amplifier 20 has a communication function for LAN connection with a control PC (personal computer) 40 via wired or wireless connection. A communication unit 24, a proximity detection sensor 28 that detects that a person has approached a predetermined area or detects a specific device of the approaching person and outputs a detection signal, and a control PC 40 connected via a network. A control unit 26 that operates by program control from a remote control unit, and a removable recording device 25 (such as an SD card or a USB memory) 25 that stores voice guide data such as advertisements and advertisement guidance when installed alone. And a digital input unit 23 for processing voice guide data such as music and advertisement guidance output by the above control.

  In addition, the sound collecting device 30 including the sound collecting microphone 30a and the signal cable 30b for collecting ambient sounds inputs the sound collected by the sound collecting microphone 30a to the analog input unit 21 of the control amplifier 20, and the sound of the control amplifier 20 is reproduced. The phase inverter 21 having the function of inverting the phase creates anti-phase noise by inverting the phase of the collected sound, and synthesizes it with the audio guide output via the digital input unit 23 by the mixer 27. By outputting from the vibration speaker 10, the effect of a noise canceller that counteracts the surrounding sound with reversed-phase noise that is phase-inverted is exhibited, and the function of outputting voice guide music and advertisements more clearly is provided. Yes.

  Note that the sound collecting device 30 may be of a type that communicates with the communication unit 24 of the control amplifier 20 wirelessly by attaching a wireless device to the sound collecting microphone 30a without using the signal cable 30b.

<Effect of acoustic masking>
Ordinary acoustic masking is a phenomenon in which, for example, in a conversation at a station platform, if there is too much a passing train, the conversation becomes impossible at all, and a loud sound is drowned into a loud sound and sound that should normally be heard is heard. It is outside the audible range.

  However, in this embodiment, the sound can be heard well only in a limited area in front of the digital signage (digital signage) using the display window, the glass case, and the display panel where the vibration speaker 10 is installed. An acoustic effect having directivity that it cannot be heard is called acoustic masking. That is, the acoustic masking device 50 using the vibration speaker 10 has strong directivity because sound generated from the flat surface of the vibrating body 60 such as a show window or a glass case is output uniformly and horizontally without being diffused. This is a sound device that uses the effect of sound.

  When the vibration speaker 10 is installed on a front panel such as an advertisement, a signboard, or a digital signage by using the acoustic effect of the acoustic masking device 50 using the vibration speaker 10, a directional sound emitted from the flat vibrating body 60 is obtained. Provide guidance and advertisements by voice guides that are added to the visual information of advertisements and signs only to the person in front of the vibrating body 60 without affecting the surrounding environment, other stores, and advertisements. Can do.

  Therefore, the acoustic masking effect is set so that the proximity detection sensor 28 detects a person standing in front of the digital signage (electronic signboard) and the voice guide can be heard only by that person as shown in FIG. The uniform and highly directional voice guide output from the flat vibrating body 60 of the acoustic masking device 50 using the speaker 10 is adjusted to a volume of about 30 to 70 dB so that a person speaks. The acoustic masking effect can be exhibited in a limited area.

  In addition, acoustic masking can provide guidance and music with a volume adjusted according to the ambient noise level, and if it is attached to a diaphragm 60 having a more directional shape such as a spherical surface or a parabolic surface, it can be specified. It is possible to provide a tracking-type acoustic masking effect for a person at a location or a specific person on the move. Using the tracking type acoustic masking function, the vibration speaker 10 installed on the ceiling or wall in a government office or hospital is linked with the proximity detection sensor 28 to be used for guidance on the route of patients and visitors. It is also possible.

  In addition, if the vibration speaker 10 is installed in the car window or bonnet exhibited at a motor show or the like, the audio guidance explaining the performance of the car will cause an illusion that the car body has started up, making the car more Can appeal.

  In addition, people who are standing in front of the display glass case 64 and the show window 63 by installing the vibration speaker 10 by using the glass case of a store or museum exhibit or a show window of a department store as a vibrating body 60. It is possible to convey the guidance of works and products decorated only in the volume at a level where people speak.

  Similarly, by installing the vibration speaker 10 on a replica, character, or other object that is set up in a museum or theme park, the object can be used as a means of transmitting facility guidance and product explanations by voice. Is possible.

  The data stored in the external recording device 25 connected to the digital input unit 23 is transmitted from the external control PC 40 to the communication unit 24 connected via a wired or wireless network to the control unit 26. Performs an update process of the external recording device 25 and is rewritten with voice guide data corresponding to the explanation of the new exhibit and the new advertisement. The data change of the external recording device 25 that has been performed individually until then can be quickly handled by connecting to the network.

<Effect of noise canceller>
As a noise canceller that reduces noise on an expressway running in an urban area, a method of canceling noise by hitting noise having a phase opposite to that of noise is known. Also in the acoustic masking device 50 using the vibration speaker 10 according to the present embodiment, as shown in FIG. 3, for example, in a specific space such as a hall of a station usually wrapped in a crowd, the walls of the space and the ceiling panel are vibrated. The vibration speaker 10 is installed using the body 60, and the noise of the hustle collected by the sound collecting microphone 30 a of the sound collecting device 30 is passed through the phase inverter 23 of the operation amplifier 20 to generate anti-phase noise. Output from the vibration speaker 10 installed on the panels on the four walls and ceiling, cancel the noise of the hustle and turn the entire hall into a quiet space, and the people who entered the hall in a moment from the hustle and bustle You can produce a surprise that gives you the illusion of jumping into the quiet space.

  The acoustic masking device 50 using the vibration speaker 10 is not only a large space such as a station hall or a hotel lobby, but also a small scale under an umbrella spread out in an open cafe shown in FIG. It works effectively even in large spaces. Explained together with the block diagram shown in FIG. 4 (b), surrounding noise is collected by a sound collecting microphone 30a attached to the tip of the umbrella and controlled via a signal cable 30b that passes through the handle of the umbrella. The phase is inverted by the phase inverter 21 of the control amplifier 20 to generate the reverse phase noise, and the audio data such as music from the external recording device 25 containing the music is synthesized by the mixer 27. When the table is output from the vibration speaker 10 attached as the vibrating body 60, the output reverse phase noise exhibits the effect of a noise canceller that cancels the surrounding noise, and only the space in the umbrella is removed from the surrounding noise. In addition, the effect of acoustic masking that allows music to be heard from the table on which the vibration speaker 10 is installed can be exhibited at the same time.

  Furthermore, when sitting at a table in a self-service restaurant or cafe and waiting for an ordered item, the proximity detection sensor 28 detects the customer's reservation tag, and the vibration speaker installed on the table indicates that the customer's ordered item has come to the counter. Voice guidance from 10 is possible.

  The acoustic masking device 50 using the vibration speaker 10 is provided with a vibration speaker 10 in a glass case of a museum or an art museum exhibit or a show window of a department store, thereby providing a sound masking function having directivity and a surrounding crowd. By linking with the noise canceller function that cancels the sound, it is possible to exert more effective acoustic masking effects.

  As described above, the noise canceler function eliminates the hustle and bustle of the surroundings by providing visual guidance by adding visual information such as paintings and statues and images without affecting the surrounding environment and other stores and advertisements. The acoustic masking apparatus using the vibration speaker provided with can be provided.

8 Double-sided adhesive tape 10 Vibration speaker 10a Vibration element 20 Control amplifier 21 Phase inverter 22 Analog input unit 23 Digital input unit 24 Communication unit 25 Recording device (corresponding to recording medium)
26 Control Unit 27 Mixer 28 Proximity Detection Sensor 30 Sound Collection Device 30a Sound Collection Microphone 40 PC (Compatible with Computer)
50 Acoustic masking device 60 Vibrating body

Claims (3)

An acoustic device that transmits sound only to people in a specific area,
A vibration speaker having a function of generating sound using the attached window glass, glass case, panel, table and frame as a vibrating body;
A sound collector that collects ambient sounds;
A recording medium on which a plurality of voice guides are recorded, a sensor that detects the approach of a person, a phase inverter that inverts the phase of sound, and a control amplifier that is connected to a computer and a network,
An acoustic masking device using a vibration speaker, wherein the plurality of audio guides recorded on the recording medium of the control amplifier are selectively output from the vibration speaker in accordance with a detection signal of the sensor.   2. The acoustic masking apparatus using a vibration speaker according to claim 1, wherein the plurality of voice guides recorded on the recording medium are changed by the computer via the network.   The control amplifier reverses the phase of the sound collected by the sound collector through the phase inverter, synthesizes the sound with the voice guide, and outputs the synthesized sound from the vibration speaker. An acoustic masking device using the vibration speaker according to claim 2.

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