JP3295139B2 - Reverberation device - Google Patents
Reverberation deviceInfo
- Publication number
- JP3295139B2 JP3295139B2 JP25802692A JP25802692A JP3295139B2 JP 3295139 B2 JP3295139 B2 JP 3295139B2 JP 25802692 A JP25802692 A JP 25802692A JP 25802692 A JP25802692 A JP 25802692A JP 3295139 B2 JP3295139 B2 JP 3295139B2
- Authority
- JP
- Japan
- Prior art keywords
- sound
- reverberation
- band
- impulse response
- room
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 230000002194 synthesizing effect Effects 0.000 claims description 7
- 230000002238 attenuated effect Effects 0.000 claims 1
- 238000000034 method Methods 0.000 description 13
- 238000004088 simulation Methods 0.000 description 13
- 238000010521 absorption reaction Methods 0.000 description 4
- 238000004364 calculation method Methods 0.000 description 4
- 238000004422 calculation algorithm Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000003321 amplification Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000035807 sensation Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K15/00—Acoustics not otherwise provided for
- G10K15/08—Arrangements for producing a reverberation or echo sound
- G10K15/12—Arrangements for producing a reverberation or echo sound using electronic time-delay networks
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- Building Environments (AREA)
- Reverberation, Karaoke And Other Acoustics (AREA)
- Management, Administration, Business Operations System, And Electronic Commerce (AREA)
Description
【0001】[0001]
【産業上の利用分野】本発明は、音場の予測技術によ
り、特に自然な音場シミュレーションを行うための残響
付加装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reverberation adding apparatus for performing a natural sound field simulation by using a sound field prediction technique.
【0002】[0002]
【従来の技術】従来の音場シミュレーションでは、初期
反射音に続く後部残響音の付加を試行錯誤で行ってきた
(例えば、坂本史江他、「群馬シンフォニーホールの音
響シミュレーション」電子情報通信学会技術研究報告V
ol.91 No.250(応用音響)P46 平成3
年9月27日発行を参照)。2. Description of the Related Art In a conventional sound field simulation, a rear reverberation sound following an initial reflection sound has been added by trial and error (for example, Fumie Sakamoto et al., "Acoustic simulation of Gunma Symphony Hall", IEICE technical research). Report V
ol. 91 No. 250 (applied sound) P46 Heisei 3
(See September 27, 2008).
【0003】また、壁面数200〜300の標準的な規
模のコンサートホール等の音場を、音源点から等立体角
間隔で多数の音線を出して反射伝搬経路を追跡計算する
音線追跡法(ray tracing method)
や各壁面の反射により虚音源を幾何学的に求め、そこか
ら観測点までの経路の作図と、その全経路長について距
離減衰を考慮して時系列のインパルス応答を近似的に求
める虚像法(image method)を用いて計算
機で模擬するのは、ぼう大な計算量を必要とするため計
算機の処理スピードが飛躍的に向上した現在においても
かなり困難である。また、これらいずれの方法でも、室
周壁を平面の集合で近似するので、その面の数を多くす
ると形の近似は良くなるが、波長より小さな平面では有
効な反射が得られなくなるための誤差が大きくなる。ま
た面への入射角により反射率が変化するが、そのデータ
は得難く、残響吸音率からの逆算値を用いる等、室内音
場をどの程度近似できているかを表すことはかなり困難
である。また、虚像法では音像の位置が幾何学的に正確
に求められるため、比較的精度よく反射音をシミュレー
トできるが、ばく大な数にのぼる虚音像について計算す
る必要から、演算時間は非常に長くなる欠点がある。A sound ray tracing method for tracking and calculating the reflection propagation path of a sound field such as a concert hall of a standard scale having 200 to 300 wall surfaces at equal solid angle intervals from a sound source point. (Ray tracing method)
Virtual image method to geometrically determine the imaginary sound source from the reflection of each wall and each wall, draw the path from there to the observation point, and approximate the time-series impulse response considering the distance attenuation for the entire path length ( It is quite difficult to simulate with a computer using the image method even in the present day when the processing speed of the computer has been dramatically improved since a large amount of calculation is required. In any of these methods, since the chamber peripheral wall is approximated by a set of planes, increasing the number of the planes improves the shape approximation.However, an error occurs because a plane smaller than the wavelength does not provide effective reflection. growing. The reflectance changes depending on the angle of incidence on the surface. However, it is difficult to obtain the data, and it is very difficult to represent the degree to which the indoor sound field can be approximated by using an inverse calculation value from the reverberation sound absorption coefficient. Also, in the virtual image method, the position of the sound image can be obtained geometrically accurately, so that the reflected sound can be simulated with relatively high accuracy.However, since it is necessary to calculate a large number of the virtual sound images, the operation time is extremely long. There are disadvantages.
【0004】[0004]
【発明が解決しようとする課題】そこで、本発明の目的
は、上述の点に鑑み、試行錯誤なしに簡易に、計算機を
用いて実用的なレベルで模擬できる初期反射音(例え
ば、直接音到来後遅れ時間100ms以内の反射音)
と、室形,内装材料の吸音率等から予測することができ
る部屋の残馨時間周波数特性をもとに、初期反射音以降
の反射音(後部残響音)を最適に予測、模擬することが
できる計算アルゴリズムの確立を図った残響付加装置を
提供することにある。SUMMARY OF THE INVENTION In view of the above, an object of the present invention is to provide an early reflection sound (for example, a direct sound arrival) which can be easily simulated at a practical level using a computer without trial and error. Reflected sound within 100 ms delay time)
It is possible to optimally predict and simulate the reflected sound after the initial reflected sound (rear reverberation sound) based on the room reverberation time frequency characteristics that can be predicted from the room shape, the sound absorption coefficient of the interior material, etc. It is an object of the present invention to provide a reverberation adding device which aims to establish a calculation algorithm which can be used.
【0005】[0005]
【課題を解決するための手段】上記目的を達成するた
め、本発明の残響付加装置は、室形データを入力する第
1の手段と、入力した前記室形データを基に模擬しよう
とする室の帯域別の初期反射音インパルス応答を求め、
求めた該初期反射音インパルス応答に基づいて帯域毎の
後部残響音の付加開始レベルを算出する第2の手段と、
入力した前記室形データを基に模擬しようとする室の残
響時間周波数特性を求め、求めた該残響時間周波数特性
を満たすよう、帯域別の減衰波形を求め、該帯域別の減
衰波形と前記後部残響音の付加開始レベルとを合成する
ことで後部残響音インパルス応答を求める第3の手段
と、各帯域毎に、前記初期反射音インパルス応答と前記
後部残響音インパルス応答とを合成し、合成した帯域毎
の反射音インパルス応答を合成して模擬インパルス応答
を得る第4の手段とを有することを特徴とする。To achieve the above object, a reverberation adding apparatus according to the present invention comprises a first means for inputting room-shaped data, and a room to be simulated based on the input room-shaped data. Find the initial reflected sound impulse response for each band of
Second means for calculating an addition start level of a rear reverberation sound for each band based on the obtained initial reflected sound impulse response;
The reverberation time frequency characteristic of the room to be simulated is obtained based on the input room shape data, and the attenuation waveform for each band is obtained so as to satisfy the obtained reverberation time frequency characteristic. Third means for obtaining a rear reverberation sound impulse response by synthesizing the reverberation sound addition start level, and synthesizing and synthesizing the initial reflected sound impulse response and the rear reverberation sound impulse response for each band. A fourth means for obtaining a simulated impulse response by synthesizing a reflected sound impulse response for each band.
【0006】[0006]
【作用】本発明の装置は、限られたデータから室(部
屋)の反射音の聴感上自然な時間応答(音源と受音点間
のインパルス応答)を、室の設計の段階で予測推定する
ための残響付加の新しい装置であり、室形データを基に
音場シュミレーション等で得られる初期反射音インパル
ス応答(初期の反射音の時系列データ)および残響時間
周波数特性のデータのみを用いて、後部残響音の付加開
始レベル、帯域別の後部残響音インパルス応答を求め、
帯域毎に初期反射音インパルス応答と後部残響音インパ
ルス応答とを合成し、合成した帯域毎の反響音インパル
ス応答を合成して模擬インパルス応答を得ることで、室
の聴感上自然な残響音を設計段階で模擬する。従って、
本発明によれば、試行錯誤なしに簡易に初期反射音以後
の後部残響音の時系列を最適に推定して付加することが
できる。The apparatus according to the present invention predicts and estimates the auditory natural time response (impulse response between the sound source and the sound receiving point) of the reflected sound of the room (room) from the limited data at the stage of designing the room. Is a new device for adding reverberation to the sound, using only the initial reflected sound impulse response (initial reflected sound time series data) and reverberation time-frequency characteristics data obtained by sound field simulation etc. based on room shape data. The additional reverberation start level and the reverberation impulse response for each band are obtained.
By combining the initial reflected sound impulse response and the rear reverberation sound impulse response for each band, and combining the synthesized reverberation sound impulse responses to obtain a simulated impulse response, a natural reverberation sound is designed for the listening sensation of the room Simulate at the stage. Therefore,
According to the present invention, it is possible to easily estimate and add the time series of the later reverberation sound after the initial reflection sound easily without trial and error.
【0007】[0007]
【実施例】以下、図面を参照して本発明の実施例を詳細
に説明する。Embodiments of the present invention will be described below in detail with reference to the drawings.
【0008】図1は本発明の残響付加装置を実施するの
に好適な機器構成の一例を示す。図1において、1は室
形データを入力するデータ入力部である。この室形デー
タとしては、通常次のものがある。(ア)室の側壁や床
などを構成する壁面の数と各壁面を代表する座標3点お
よびそれぞれの壁面の吸音率、(イ)突出壁面の有無、
あればその数と壁面番号、(ウ)各壁面毎の隣接する壁
面の数とその番号、(エ)音源の座標および音線法では
観測面の位置と範囲、虚像法では観測点の座標、(オ)
隣接する壁面同士が同一平面上にあれば、その壁面番号
と隣接する稜線を代表する座標2点、(カ)反射回数お
よび反射音の遅れ時間の計算限界、(キ)そのほか、諸
出力データの制御用各種数値。FIG. 1 shows an example of an apparatus configuration suitable for implementing the reverberation adding apparatus of the present invention. In FIG. 1, reference numeral 1 denotes a data input unit for inputting room shape data. The room type data is usually as follows. (A) The number of walls constituting the side wall and floor of the room, three coordinates representing each wall and the sound absorption coefficient of each wall, (b) presence or absence of a protruding wall,
(C) Number and number of adjacent walls for each wall, if any, (d) Coordinates of sound source and position and range of observation surface in sound ray method, coordinates of observation point in virtual image method, (E)
If the adjacent wall surfaces are on the same plane, two points representing the wall number and the adjacent ridge line, (f) the calculation limit of the number of reflections and the delay time of the reflected sound, (g) other data of various output data Various numerical values for control.
【0009】2は室形データを基にシミュレーションを
実行するシミュレーション実行部であり、CPU(中央
演算処理部),処理手順等を格納したROM(リードオ
ンリメモリ),作業域のRAM(ランダムアクセスメモ
リ)等から構成される一般的なコンピュータが適用でき
る。3はシミュレーション実行部2へ畳み込み処理に用
いるデータを供給するドライソースである。4はディジ
タル・アナログ(D/A)変換器、5は増幅器、6はス
ピーカであり、これら4〜6によりシミュレーション実
行部2のシミュレーション出力(模擬残響音)を可聴音
で聴くための可聴化部7を構成する。Reference numeral 2 denotes a simulation execution unit for executing a simulation based on the room data, a CPU (central processing unit), a ROM (read only memory) storing processing procedures and the like, and a RAM (random access memory) of a work area. ) Can be applied. A dry source 3 supplies data used for the convolution processing to the simulation execution unit 2. Reference numeral 4 denotes a digital / analog (D / A) converter, reference numeral 5 denotes an amplifier, and reference numeral 6 denotes a loudspeaker. 7 is constituted.
【0010】本発明で前提とした条件は、各周波数帯域
における残響減衰は指数関数で近似できるとした点であ
る。The condition presupposed in the present invention is that reverberation attenuation in each frequency band can be approximated by an exponential function.
【0011】次に、本発明の基本的な処理の流れを図2
のフローチャートを参照して説明する。Next, the basic processing flow of the present invention is shown in FIG.
This will be described with reference to the flowchart of FIG.
【0012】 ステップS1: 一般的に音場シミュ
レーションに用いられている前述した音線追跡法または
虚像法を使って、音源から受音点までの帯域別インパル
ス応答を求める。この際、反射音を求める範囲は、実用
的な見地から、直接音到来後の時間遅れ(以後、DTと
表す)100ms〜200msの初期部分(初期反射
音)とする。Step S1: An impulse response for each band from a sound source to a sound receiving point is obtained by using the above-described ray tracing method or virtual image method generally used for sound field simulation. At this time, the range in which the reflected sound is obtained is, from a practical point of view, an initial portion (initial reflected sound) of 100 ms to 200 ms, which is a time delay (hereinafter, referred to as DT) after the direct sound arrives.
【0013】 ステップS2: 時刻DTにおける後
部残響音の開始レベルL(DT)は、音場シミュレーシ
ョンから求めた時刻tn における初期反射音の振幅(p
n )および聴覚の積分機能(時定数=α)を利用したエ
ンベロープの振幅(Ln )をもとに、次式のアルゴリズ
ムに従って算出する。すなわち、時刻tn-1 におけるエ
ンベロープの振幅(Ln-1 )から時刻tn で予測される
値(=Ln ′=Ln-1exp(−Δt/α)、Δt=tn
−tn-1 )よりも初期反射音の振幅pn が大きい場
合、時刻tn におけるエンベロープの振幅Ln は、Step S2: The start level L (DT) of the rear reverberation sound at time DT is determined by the amplitude (p) of the initial reflection sound at time t n obtained from the sound field simulation.
n ) and the amplitude (L n ) of the envelope utilizing the auditory integration function (time constant = α), according to the following equation algorithm. That is, the time t n-1 in the envelope of the amplitude (L n-1) from the value predicted at time t n (= L n '= L n-1 exp (-Δt / α), Δt = t n
-T n-1) when the amplitude p n of the initial reflected sound is greater than, the envelope amplitude L n of at time t n,
【0014】[0014]
【数1】Ln =Ln ′+pn で与えられ、一方Ln ′がpn より大きい場合は、L
n ′によってpn がマスクされると仮定し、[Number 1] 'given by + p n, whereas L n' L n = L n is greater than p n is, L
Suppose pn is masked by n '
【0015】[0015]
【数2】Ln =Ln ′ として求める。以後同様の手続きにより、時刻DTにお
ける初期反射音のエンベロープの振幅を推定し、この値
を後部残響音の開始レベルとして採用する。図3は、音
場シミュレーション等によって求めた初期反射音の時系
列から、後部残響音の開始レベルを算出することを表
し、ここで、fi は各帯域の中心周波数、RTi は中心
周波数fi における残響時間である。## EQU2 ## Determined as L n = L n ′. Thereafter, by the same procedure, the amplitude of the envelope of the early reflection sound at the time DT is estimated, and this value is adopted as the start level of the rear reverberation sound. FIG. 3 shows calculation of the start level of the reverberation sound from the time series of the initial reflection sound obtained by the sound field simulation or the like, where f i is the center frequency of each band, and RT i is the center frequency f This is the reverberation time at i .
【0016】 ステップS3: 後部残響音について
は、まず室壁面の面積,内装材料の吸音率および室容積
から室の残響時間を求めるEyringの公式を用い
て、模擬しようとする室の残響時間周波数特性を求め
る。Step S3: Regarding the rear reverberation sound, first, the reverberation time frequency characteristic of the room to be simulated using Eyring's formula for obtaining the reverberation time of the room from the area of the room wall surface, the sound absorption coefficient of the interior material, and the room volume. Ask for.
【0017】 ステップS4: 時間軸方向に一様乱
数を発生させ(2000本/秒以上)て、パルス列と
し、それらの時刻における包絡線の減衰が残響時間周波
数特性と一致する様に作成する。さらにそれぞれの帯域
でFIR型のバンドパスフィルタを設計し、これらを
、ステップで求めたパルス列に畳み込むことにより
各帯域の後部残響音列(後部残響音インパルス応答)を
得る。Step S4: A uniform random number is generated in the time axis direction (2000 / sec or more) to generate a pulse train, and the pulse train is created such that the attenuation of the envelope at those times coincides with the reverberation time frequency characteristics. Further, an FIR type band-pass filter is designed for each band, and these are convolved with the pulse train obtained in the step to obtain a rear reverberation sound train (rear reverberation sound impulse response) of each band.
【0018】 ステップS5: それぞれの帯域で、
初期音部と後部残響音部とを合成し、反射音時系列を得
る。Step S5: In each band,
The initial sound part and the rear reverberation part are synthesized to obtain a reflected sound time series.
【0019】 ステップS6: 最後に、各帯域の反
射音時系列を合成することにより、図4に示すように、
残響時間周波数特性を満足した模擬インパルス応答を得
る。Step S6: Finally, by synthesizing the reflected sound time series of each band, as shown in FIG.
A simulated impulse response satisfying the reverberation time frequency characteristics is obtained.
【0020】図4は周波数帯域に分割したインパルス応
答を再合成して所望の残響付加を行うことを示す。ここ
で、pはインパルス応答の振幅値、tは時間、DTは後
部残響音開始時間、BPF(i)はfi を中心周波数と
する帯域通過フィルタである。図中のは残響時間RT
i のパルス列、は残響時間RTi でかつ帯域制限され
たパルス列、は全帯域の初期反射音(シミュレーショ
ン)、は帯域制限された初期反射音、は中心周波数
をfi とする帯域の残響音(DT以降に残響音を付加し
たもの)、は全帯域の残響音を表わしている。FIG. 4 shows that a desired reverberation is added by resynthesizing an impulse response divided into frequency bands. Here, p is the amplitude value of the impulse response, t is time, DT is the rear reverberation sound start time, and BPF (i) is a band-pass filter whose center frequency is f i . Reverberation time RT in the figure
i, a pulse train with reverberation time RT i and band-limited, an initial reflected sound (simulation) of the whole band, an initial reflected sound of which band is limited, and a reverberant sound of a band whose center frequency is f i ( The reverberation added after DT) indicates the reverberation in the whole band.
【0021】[0021]
【発明の効果】以上説明したように、本発明によれば、
部屋の音響設計時に算出する比較的容易に求めることの
できる初期反射音および設計の段階で予測可能な残響時
間周波数特性の情報のみを用いて、後部残響音の付加開
始レベル,帯域別の減衰波形を推定・算出し、それらを
再合成した後、既知の初期反射音に付加することによ
り、部屋の自然な残響音を設計段階で模擬するようにし
たので、従来、試行錯誤で行ってきた聴覚上自然な後部
残響音の模擬を、簡易に得ることができる。また、本発
明では、従来困難であった、自然な後部残響音の生成,
付加を、計算機等で実用的に模擬することが容易にでき
るので、将来の多チャンネル音場シミュレーションおよ
び高能率音声符号化等にも適用可能である。As described above, according to the present invention,
Using only the initial reflected sound, which can be calculated relatively easily at the time of room acoustic design, and the reverberation time-frequency characteristic information that can be predicted at the design stage, the additional start level of the reverberant sound and the attenuation waveform for each band After estimating and calculating these, re-synthesizing them, and adding them to the known early reflections, the natural reverberation of the room was simulated at the design stage. It is possible to easily obtain a simulated natural reverberation sound. Further, in the present invention, generation of natural rear reverberation sound, which has been difficult in the past,
Since the addition can be easily simulated practically by a computer or the like, it can be applied to future multi-channel sound field simulation, high-efficiency speech coding, and the like.
【図1】本発明の残響付加装置を実施するのに好適な機
器構成の一例を示す構成図である。FIG. 1 is a configuration diagram showing an example of a device configuration suitable for implementing a reverberation adding device of the present invention.
【図2】本発明の残響音付加の基本的な処理の流れを示
すフローチャートである。FIG. 2 is a flowchart showing a basic processing flow of reverberation sound addition according to the present invention.
【図3】帯域毎に残響時間周波数特性を示す説明図であ
る。FIG. 3 is an explanatory diagram showing reverberation time frequency characteristics for each band.
【図4】予測した初期反射音部に後部残響音部を生成・
付加することを示す説明図である。FIG. 4 generates a rear reverberation part in a predicted initial reflection part.
It is explanatory drawing which shows adding.
1 データ入力部 2 シミュレーション実行部 3 ドライソース 4 D/A変換器 5 増幅部 6 スピーカ 7 可聴化部 DESCRIPTION OF SYMBOLS 1 Data input part 2 Simulation execution part 3 Dry source 4 D / A converter 5 Amplification part 6 Speaker 7 Audible part
───────────────────────────────────────────────────── フロントページの続き (72)発明者 西 隆司 東京都世田谷区砧一丁目10番11号 日本 放送協会 放送技術研究所内 (56)参考文献 特開 平3−38695(JP,A) 特開 平4−189000(JP,A) 特開 平5−43700(JP,A) (58)調査した分野(Int.Cl.7,DB名) G10K 15/12 E04B 1/99 G06F 17/00 ──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Takashi Nishi 1-10-11 Kinuta, Setagaya-ku, Tokyo Japan Broadcasting Corporation Broadcasting Research Institute (56) Reference JP-A-3-38695 (JP, A) JP Hei 4-189000 (JP, A) JP-A Hei 5-43700 (JP, A) (58) Fields investigated (Int. Cl. 7 , DB name) G10K 15/12 E04B 1/99 G06F 17/00
Claims (1)
域別の初期反射音インパルス応答を求め、求めた該初期
反射音インパルス応答に基づいて帯域毎の後部残響音の
付加開始レベルを算出する第2の手段と、 入力した前記室形データを基に模擬しようとする室の残
響時間周波数特性を求め、求めた該残響時間周波数特性
を満たすよう、帯域別の減衰波形を求め、該帯域別の減
衰波形と前記後部残響音の付加開始レベルとを合成する
ことで後部残響音インパルス応答を求める第3の手段
と、 各帯域毎に、前記初期反射音インパルス応答と前記後部
残響音インパルス応答とを合成し、合成した帯域毎の反
射音インパルス応答を合成して模擬インパルス応答を得
る第4の手段とを有することを特徴とする残響付加装
置。A first means for inputting room shape data; an initial reflected sound impulse response for each band of a room to be simulated based on the input room shape data; A second means for calculating an additional start level of a rear reverberation sound for each band based on the response; a reverberation time frequency characteristic of a room to be simulated based on the input room shape data; Third means for obtaining an attenuated waveform for each band so as to satisfy the frequency characteristic, and for obtaining an impulse response of a rear reverberation sound by synthesizing the attenuation waveform for each band and an addition start level of the rear reverberation sound; Fourth means for combining the initial reflected sound impulse response and the rear reverberant sound impulse response, and synthesizing the reflected sound impulse response for each synthesized band to obtain a simulated impulse response. Characteristic reverberation adding device.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP25802692A JP3295139B2 (en) | 1992-09-28 | 1992-09-28 | Reverberation device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP25802692A JP3295139B2 (en) | 1992-09-28 | 1992-09-28 | Reverberation device |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH06110484A JPH06110484A (en) | 1994-04-22 |
JP3295139B2 true JP3295139B2 (en) | 2002-06-24 |
Family
ID=17314504
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JP25802692A Expired - Fee Related JP3295139B2 (en) | 1992-09-28 | 1992-09-28 | Reverberation device |
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JP (1) | JP3295139B2 (en) |
Families Citing this family (3)
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---|---|---|---|---|
JP4062959B2 (en) | 2002-04-26 | 2008-03-19 | ヤマハ株式会社 | Reverberation imparting device, reverberation imparting method, impulse response generating device, impulse response generating method, reverberation imparting program, impulse response generating program, and recording medium |
KR100769990B1 (en) * | 2004-07-20 | 2007-10-25 | 재단법인서울대학교산학협력재단 | Apparatus and Method for Controlling Spatial Impulse Response for Spaciousness and Auditory Distance Control of Stereophonic Sound |
DE102013223201B3 (en) * | 2013-11-14 | 2015-05-13 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Method and device for compressing and decompressing sound field data of a region |
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1992
- 1992-09-28 JP JP25802692A patent/JP3295139B2/en not_active Expired - Fee Related
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