JPH11327568A - Device and method for experiencing sound field in room - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an intra-room sound field experiencing device and a method capable of satisfying the request for experiencing a sound field in a room. SOLUTION: The device is provided with a room constitution input part 12 for inputting the size of a room to be experienced and the arrangement of furniture or the like, a member information input part 13 for inputting the materials, characteristics, etc., of respective members in the room, an objective sound input part 14 for inputting the sort/position of a sound to be experienced how an experiencing user can hear it, and a sound receiving position input part 15 for inputting the position of the user in the room. The device is also provided with an objective sound recording/reproducing part 4 for recording/reproducing the sound to be experienced, a sound field calculation part 2 for calculating a sound field in the room based on the sound absorbing characteristics and sound reflection characteristics of constitutional members in the room and a sound generated in the room, a transmission characteristic calculation part 3 for finding out a transmission characteristic between a sound source and a receiving position, a sound field working part 4 for working an original sound based on the result calculated by the calculation part 3, and a sound generation part 11 for reproducing the sound in the room as a practical sound.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a room for building a house, such as how to change the sound absorption characteristics of walls, floors, ceilings, etc. of the house, the sound reflection characteristics, and the arrangement of furniture. TECHNICAL FIELD The present invention relates to an indoor sound field experience apparatus and method that allow the user to experience how the sound inside the room is heard and can be used for evaluating the sound absorption characteristics of members.

[0002]

2. Description of the Related Art Sounds that can be heard by a person indoors include sounds transmitted from the outside as solid sounds and transmitted sounds, and sounds generated indoors and transmitted directly or reflected on walls, floors, ceilings, and the like. There is. As a prior art of such a sound simulation apparatus, as described in JP-A-7-168587, the sound is reflected from a sound source in a room using a sound ray method or directly reaches a sound receiving point. Some calculate sound. Although this method is effective for a large space such as a hall, it is not effective for a space such as a living room in a general home that is not too large compared to the wavelength of sound. This is because, in the acoustic ray method, the number of reflections on a wall or the like increases in a space that is not so large as compared with the wavelength of the sound, so that both the accuracy and the calculation time deteriorate.

[0003]

[0006] When a business negotiation between a customer who intends to build a house and a designer (or a salesperson) generally proceeds with a floor plan or the like. At that time, for example, "What is the difference between the sound of flooring and tatami mats, how is the arrangement of furniture, etc.?If you change the structure of the wall etc., the dark noise changes and the sound of the TV becomes easier to hear It is intended to provide an indoor sound field experience apparatus and method satisfying a desire to experience a sound field inside a room when a customer has a question such as "?".

[0004]

Means for Solving the Problems According to the invention of claim 1 of the present application (the present invention 1), a room configuration input section for inputting the size of a room to be experienced, the arrangement of furniture, etc., and the material of each member in the room Input part information to input the type and position of the target sound you want to experience how you actually hear it, and sound receiving position to input the position of the user in the room Calculates the sound field inside the room based on the input unit, the target sound recording / playback unit that records and plays the sound you want to experience, and the sound absorption characteristics, sound reflection characteristics, and sound generated in the room of the components in the room A sound field calculator that calculates the transfer characteristics between the sound source and the receiving position, a sound field processor that processes the original sound based on the results calculated by the transfer characteristics calculator, and the actual sound in the room Room sound field experience device that has a sound generator for playing back as sound That.

[0005] A second aspect of the present invention (the second aspect of the present invention) is the first aspect of the present invention, wherein the sound field calculation unit uses a finite element method, a boundary element method, a finite volume method, or a combination thereof.
2. The indoor sound field experience device according to item 1.

[0006] The invention of claim 3 of the present application (invention 3) is a process for inputting the configuration of a room such as the size of a room to be experienced, the arrangement of furniture, and the like. A step of inputting information, a step of inputting the type and location of a target sound that one wants to experience how to hear, a step of performing acoustic analysis using the input conditions as boundary conditions, and calculating a transfer characteristic of the result, This is an indoor sound field experience method including a process of processing a sound to be experienced based on the obtained transfer characteristics, and a process of actually outputting the processed sound as a sound.

[0007]

The apparatus and method for experiencing the indoor sound field according to the present invention firstly provides information on the room to be experienced (partition members of the room, such as walls, floors, ceilings, etc., or objects arranged in the room, such as furniture, appliances, etc.). ), Information about those components (sound absorption characteristics, reflection characteristics, etc.)
Sound analysis is performed using the sound you want to experience and the sound receiving position in the room as boundary conditions, and based on the calculation results, the sound is output from speakers, headphones, etc. You can experience how the sound changes and sounds.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing an example of an indoor sound field experience device of the present invention, FIG. 2 is a perspective view showing an example of an analysis model when the finite element method is used in the present invention, and FIG. It is a perspective view which shows an example of the model after subdivision.

As shown in FIG. 1, the indoor sound field experience apparatus of this example includes an information input unit 1, a target sound field calculation unit 2, a target sound transfer characteristic calculation unit 3, a target sound recording / reproduction unit 4, a target sound recording / reproduction unit 4, Sound field processing unit 5, dark noise sound field calculation unit 6, dark noise transfer characteristic calculation unit 7, dark noise recording / playback unit 8, dark noise sound field processing unit 9, target sound / dark noise synthesis unit 10, sound generation A section 11 is provided.
The information input unit 1 includes a room configuration input unit 12, a member information input unit 13, a target sound input unit 14, a sound receiving position input unit 15, and a dark noise input unit 16. The room configuration input unit 12
It is for inputting the size of the room you want to experience and the arrangement of furniture and the like. The member information input unit 13 is a part for inputting the material, characteristics, and the like of each member in the room. The target sound input unit 14 is for inputting the type and position of the target sound that the user wants to experience how the sound is actually heard. The sound receiving position input unit 15 is for inputting the position of the experienced person in the room. The dark noise input unit 16 is for inputting the type and level of the dark noise when considering the dark noise transmitted from a wall or the like.

The target sound field calculator 2 calculates the sound field inside the room based on the sound absorption characteristics and sound reflection characteristics of the components in the room, and the sound generated in the room. The target sound transfer characteristic calculation unit 3 is for obtaining a transfer characteristic between the sound source and the reception position. Analysis methods include, for example, the finite element method,
Use the boundary element method, finite volume method, etc. In the finite element method, as shown in FIG. 2, first, a low board 17, a television 18, a table 19, a sofa 20,
The closet 21 and the like are modeled, and the area is finely divided into mesh screens as shown in FIG. For that area, walls,
Set sound absorption and reflectance of the floor, ceiling, etc., and determine sound sources and sound receiving points. After that, it is a method of obtaining the transfer characteristics for each of the finely divided areas. The target sound transfer characteristic calculation unit 3 obtains a filter representing the attenuation performance between the target sound and the receiver from the result obtained by the target sound field calculation unit 2. The target sound field processing unit 5 processes the original sound based on the result calculated by the target sound transfer characteristic calculation unit 3. The target sound recording / reproducing unit 4 is for recording / reproducing a sound to be experienced. The sound generator 11 is for actually reproducing the sound in the room as a sound. FIG. 1 shows an example in which one speaker is arranged, but a plurality of speakers may be prepared on a peripheral wall surface.

In the indoor sound field experience apparatus of this example, the dark noise input section 16 of the information input section 1, the dark noise sound field characteristic calculation section 7, the dark noise recording / reproducing section 8, the dark noise sound field processing section 9, The target sound / dark noise synthesizing unit 10 is a part used when considering dark noise transmitted from a wall or the like.

The dark noise input section 16 of the information input section 1 is for inputting the type and level of dark noise. The dark noise sound field calculator 6 calculates the sound field inside the room based on the dark noise. The dark noise transfer characteristic calculation unit 7 is for obtaining a transfer characteristic between the dark noise and the sound receiving position.
The dark noise sound field processing unit 9 processes the original sound based on the result calculated by the dark noise transfer characteristic calculation unit 7. The target sound / dark noise synthesis unit 10 is a unit that synthesizes the processed target sound processing unit 5 and the dark noise sound field processing unit 9.

FIG. 4 is a flow chart showing an example of the indoor sound field experience method of the present invention using the apparatus described with reference to FIGS. In the room configuration input step S11, information on the size of the room to be experienced by the room configuration input unit 12, the presence or absence of walls, floors, ceiling members, windows, curtains, etc., furniture, appliances, and the like is input.

In the member information input step S12, the sound absorption characteristics and reflection characteristics of the arrangement information in the room input by the member information input unit 13 are input or extracted from the database.

In the sound field inputting step S13, a sound that one actually wants to experience in the room is input by the target sound input unit 14, or the sound is extracted from a database and the position of the sound source is input. Also, the sound receiving position input unit 15 specifies at which position in the room the sound is to be heard. When the dark noise transmitted from a wall or the like is considered, the type and level of the dark noise are input from the dark noise input unit 16.

In the sound field calculation step S14, the in-room information input by the target sound field calculation unit 2 is used as a boundary condition.
Perform acoustic analysis to find the sound field inside the room.

In the sound field processing step S15, the target sound recording / reproducing unit 4 reproduces a sound (for example, TV sound, music, etc.) that the user wants to hear, and the target sound recording / reproducing unit 5 controls the transmission characteristics of the sound. Apply a filter to create the sound at the receiving position. Similarly to the target sound, the dark noise sound field calculation unit 6, the dark noise transmission characteristic calculation unit 7, and the dark noise sound field processing unit 9 determine the transmitted sound after attenuation at the sound receiving position. However, it is not necessary to consider dark noise.

In the sound output step 16, the target sound / dark noise synthesizing unit 10 synthesizes both the target sound and the dark noise to produce a sound that can be finally heard by the receiver. The sound generator 11 outputs the calculated sound. The sound generator 11 may be composed of, for example, an audio amplifier and a speaker,
A headphone or an earphone may be used, but a (flat) one having as good a frequency characteristic as possible is desired.

[0019]

The indoor sound field experience apparatus and method of the present invention include:
Since it is made as described above, first, information of each member constituting the room (the structure of each member, sound absorption and reflection characteristics of each member), a target sound, and a sound receiving position are input, and the input information is input. Acoustic analysis is performed based on the characteristics to determine the transfer characteristics. As a result, it is possible to determine how a certain sound (human voice, music, etc.) sounds at the sound receiving position. Similarly, it is possible to determine how the incoming sound is heard by the receiver, so that after synthesizing these sounds and outputting them as sound from a speaker or the like, the sound field in the room can be experienced. . Therefore, you can experience the indoor sound environment of various configurations,
Further, a change in the sound environment when the condition is changed can be checked at any time. The apparatus and method can be used as a sales promotion tool for customers and also for designers or researchers to evaluate the sound environment.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an example of an indoor sound field experience device of the present invention.

FIG. 2 is a perspective view showing an example of an analysis model when a finite element method is used in the present invention.

FIG. 3 is a perspective view showing an example of a model after area segmentation in the present invention.

FIG. 4 is a flowchart showing steps of an example of the indoor sound field experience method of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Information input part 2 Target sound field calculation part 3 Target sound transfer characteristic calculation part 4 Target sound recording / playback part 5 Target sound field processing part 6 Dark noise sound field calculation part 7 Dark noise transmission characteristic calculation part 8 Dark noise recording・ Reproduction unit 9 Dark noise sound field processing unit 10 Target sound / dark noise synthesis unit 11 Sound generation unit 12 Room configuration input unit 13 Member information input unit 14 Target sound input unit 15 Sound receiving position input unit 16 Dark noise input unit S11 Room Configuration input step S12 Member information input step S13 Sound field input step S14 Sound field calculation step S15 Sound field processing step S16 Sound output step

Claims (3)

[Claims] 1. A room configuration input unit for inputting the size of a room to be experienced and arrangement of furniture, etc., a member information input unit for inputting materials, characteristics, and the like of each member in the room, The type of sound you want to experience
A target sound input unit for inputting the position, a sound receiving position input unit for inputting the position of the user in the room, a target sound recording / playback unit for recording / playing the sound you want to experience, A sound field calculation unit that calculates a sound field inside a room based on sound absorption characteristics, sound reflection characteristics, and sound generated in a room; a transfer characteristic calculation unit that calculates transfer characteristics between a sound source and a reception position; An indoor sound field experience device comprising: a sound field processing unit for processing an original sound based on a result calculated by a calculation unit; and a sound generating unit for actually reproducing a sound in a room as a sound. 2. The indoor sound field experience apparatus according to claim 1, wherein the sound field calculation unit uses a finite element method, a boundary element method, a finite volume method, or a combination thereof. 3. A process of inputting a room configuration such as a size of a room to be experienced and a layout of furniture, and a process of inputting member information such as a material and characteristics of each member in the room. Entering the type and location of the target sound you want to experience, performing acoustic analysis using the input conditions as boundary conditions, calculating the resulting transfer characteristics, and creating the sound you want to experience based on the determined transfer characteristics A method for experiencing a room sound field, comprising a step of processing and a step of actually outputting the processed sound as sound.