JPS60183900A - Device for improving sound in automobile - Google Patents
Device for improving sound in automobileInfo
- Publication number
- JPS60183900A JPS60183900A JP59040075A JP4007584A JPS60183900A JP S60183900 A JPS60183900 A JP S60183900A JP 59040075 A JP59040075 A JP 59040075A JP 4007584 A JP4007584 A JP 4007584A JP S60183900 A JPS60183900 A JP S60183900A
- Authority
- JP
- Japan
- Prior art keywords
- sound
- speaker
- amplifier
- audio signal
- noise
- 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.)
- Pending
Links
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
- G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/175—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound
- G10K11/178—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase
- G10K11/1785—Methods, e.g. algorithms; Devices
- G10K11/17853—Methods, e.g. algorithms; Devices of the filter
-
- 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
- G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/175—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound
- G10K11/178—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase
- G10K11/1787—General system configurations
- G10K11/17875—General system configurations using an error signal without a reference signal, e.g. pure feedback
-
- 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
- G10K2210/00—Details of active noise control [ANC] covered by G10K11/178 but not provided for in any of its subgroups
- G10K2210/10—Applications
- G10K2210/128—Vehicles
- G10K2210/1282—Automobiles
-
- 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
- G10K2210/00—Details of active noise control [ANC] covered by G10K11/178 but not provided for in any of its subgroups
- G10K2210/30—Means
- G10K2210/301—Computational
- G10K2210/3011—Single acoustic input
-
- 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
- G10K2210/00—Details of active noise control [ANC] covered by G10K11/178 but not provided for in any of its subgroups
- G10K2210/30—Means
- G10K2210/301—Computational
- G10K2210/3028—Filtering, e.g. Kalman filters or special analogue or digital filters
-
- 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
- G10K2210/00—Details of active noise control [ANC] covered by G10K11/178 but not provided for in any of its subgroups
- G10K2210/30—Means
- G10K2210/321—Physical
- G10K2210/3221—Headrests, seats or the like, for personal ANC systems
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- Fittings On The Vehicle Exterior For Carrying Loads, And Devices For Holding Or Mounting Articles (AREA)
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
- Circuit For Audible Band Transducer (AREA)
Abstract
Description
【発明の詳細な説明】
(産業上の利用分野)
本発明は、車室内に生じる振動騒音を低減する車内音改
質装置に関する。DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) The present invention relates to a vehicle interior sound modification device that reduces vibration noise generated in a vehicle interior.
(従来技術)
乗用車等の車内には、車室の体積変化により生じるこも
り音や、エンジン回転の振動によって生じる騒音が存在
し、乗車者に不快感をおよぼしており、この車内騒音の
低減が94−4 il、でいる。(Prior art) In the interior of a passenger car, etc., there are muffled sounds caused by changes in the volume of the passenger compartment and noise caused by vibrations of engine rotation, causing discomfort to passengers. -4 il.
従来、傷内の騒貧対策は、エンジン等の騒音発生源ある
いI″i止体構体構造良を栴すとめう方法により行なわ
れているが、このような対策に上っで十分な騒音低減を
達成しようとすると、車両の増加をもたらしたり、居住
性を低下したり、さらには車両価格の大幅な上昇をもた
らすという問題が生じる。Conventionally, countermeasures against noise within the wound have been taken by reducing the noise generation source such as the engine or the structural integrity of the I''i stopper structure. Attempts to achieve reductions pose problems such as increasing the number of vehicles, reducing comfort, and even significantly increasing vehicle prices.
また、*内騒音対策の一例として、特開昭57−136
811号公報において、車内に設置されたカーステレオ
等の音響装置に自動音量調整装置を組み込み、走行中の
車内の騒音レベルに応じて音響装置からの音量を自動的
に調整して、常に音楽等を聴取し謳い音量になるように
し、車内騒音の影響を相対的に低減するようにしたもの
が提案されているが、この騒音対策は直円騒音の影響を
単に相対的に低減せしめたものであり、本質的々騒音対
策とけなり得ない。*As an example of internal noise countermeasures, JP-A-57-136
In Publication No. 811, an automatic volume adjustment device is incorporated into a sound device such as a car stereo installed in a car, and the volume from the sound device is automatically adjusted according to the noise level inside the car while the car is running, so that music etc. It has been proposed to relatively reduce the influence of in-vehicle noise by making the sound louder than usual, but this noise countermeasure only relatively reduces the influence of rectangular noise. Yes, it is essentially a noise countermeasure.
本発明者は、車両の重量の増加あるいは居住性の低下お
よび兎肉価格の大幅な上昇をもたらすことなく、車室内
置を本質的に低下せしめることに関して鋭意研究を行な
った。本発明者は、従来から知られている、ある音にこ
れと逆位相の音を重ね合わせ音を相殺消去する方法が本
質的に車室内置を消去低減せしめることのできる有効々
方法であることに着目し、さらに研究を進めたところ以
下の様な問題が生じることが見い出された。即ち、車室
内で収音さノtた車室同音を単に逆位相にして、こ、1
をスピーカから車室に放出したのでば、車室内置の消去
、非消去が繰り返えされ%車室内置のl自失を十分に行
なうことができないという問題が見い出された。The inventors of the present invention have conducted extensive research on how to essentially reduce the interior space of a vehicle without increasing the weight of the vehicle, reducing comfort, or significantly increasing the price of rabbit meat. The present inventor believes that the conventionally known method of superimposing a certain sound with a sound of the opposite phase to cancel out the sound is an effective method that can essentially reduce noise in the interior of a vehicle. As a result of further research, the following problems were discovered. In other words, the same sound that was collected inside the vehicle is simply reversed in phase.
It has been discovered that if the noise is emitted from the speaker into the vehicle interior, the interior of the vehicle is repeatedly erased and non-erased, making it impossible to sufficiently erase the interior of the vehicle.
(発明の目的)
本発明の目的は、屯室内音治−収音して得られた音声信
号の位相を反転して、この位相反転−X ′I’した音
声信号を車室内に設置されたスピーカに与えることによ
シ亜室内で収音された音と逆位相の音を発生して車室内
音f、消去または低減するようにした場合において生じ
る車室同音の消去、非消去の繰り返えしをなくし、車室
内置のtp去または低減を安定して行ない得るようにし
た車室内音数η装置を提供することにある。(Object of the Invention) The object of the present invention is to invert the phase of the audio signal obtained by sound treatment in the passenger compartment, and to transmit the phase-inverted audio signal to a system installed in the passenger compartment. Repeated cancellation and non-cancellation of the same sound in the passenger compartment that occurs when a sound with a phase opposite to the sound picked up in the sub-compartment is generated by giving it to a speaker to eliminate or reduce the sound in the passenger compartment. It is an object of the present invention to provide a vehicle interior sound number η device which eliminates noise and can stably remove or reduce tp in a vehicle interior.
(発明の構成)
本発明の蚕室内音改質装筋′は、車室内に設置されて車
内音を収音して音声信号に変換するマイクロフォンと、
該音声信号から予め定められた周波数域の音声信号を取
り出すフィルタ手l々と%該フィルタ手段を通7過した
音声信号を逆位相とする位相反転手段と、該位相反転手
段により反転された音声信号を車室内に発するスピーカ
と、前記フィルタ手段と前記位相反転手段との間に設け
られ前記位相反転手段に入力される音声信号から前記ス
ピーカから発生された音声信号を減じる減算回路とが備
えられたことを特徴とする。l?Dち、本発明において
は、収音された車内音のうち、スピーカにより発せられ
た音声を除去し、この音声信号をスピーカから発生して
騒廿となる本来の車室同音のみを消去するようにしたの
で、従来ような車室内置の消去、非消去の繰り返えしが
発生せず安定1−て止室内貧の消去または低減を行なう
ことができる。(Structure of the Invention) The silkworm room sound modification module' of the present invention includes a microphone that is installed in the car interior and collects the car interior sound and converts it into an audio signal;
A filter for extracting an audio signal in a predetermined frequency range from the audio signal, a phase inverting unit for inverting the phase of the audio signal that has passed through the filtering unit, and audio inverted by the phase inverting unit. A speaker for emitting a signal into the vehicle interior, and a subtraction circuit provided between the filter means and the phase inversion means to subtract the audio signal generated from the speaker from the audio signal input to the phase inversion means. It is characterized by: l? D. In the present invention, the sound emitted by the speaker is removed from the collected sound inside the car, and only the original sound inside the car that is generated by the speaker and generated by the sound signal is erased. Therefore, it is possible to stably eliminate or reduce the depletion of the interior of the vehicle without repeating erasing and non-erasing of the vehicle interior as in the conventional case.
(実施例)
以下、本発明の正室内音改備装置の一実篩例を図面を用
いて詳細に説明する。(Example) Hereinafter, an example of the sieve of the correct room sound improvement device of the present invention will be described in detail with reference to the drawings.
車内の曲間シートlのへラドレフト2の近くにマイクロ
ホン3が設けられており、このマイクロホン3からの出
力はマイク闘用アンプ4により増幅をれた後、所定の周
波数領域の音声信号のみをe波するフィルタ5を通路し
て差動アンプ6の一方の入力端子6aに入力される。差
動アンプ6の出力は位相反転回路7を通過した後スピー
カ用アンプ8に入力されるが、位相反転回路7の出力は
またバッファアンプ9を介して差動アンプ6の他方の入
力端子6bに入力するようニナっている。A microphone 3 is installed near the left side 2 of the music seat L in the car, and the output from this microphone 3 is amplified by a microphone amplifier 4, and then only audio signals in a predetermined frequency range are emitted. The signal passes through the wave filter 5 and is input to one input terminal 6a of the differential amplifier 6. The output of the differential amplifier 6 is input to the speaker amplifier 8 after passing through the phase inversion circuit 7, but the output of the phase inversion circuit 7 is also input to the other input terminal 6b of the differential amplifier 6 via the buffer amplifier 9. It's asking me to type.
スピーカ用アンプ8によ−って増幅式す1−た音声信号
ニ後部シート10の後方に設置Ii、されたス已−力1
1から音声として発生され、騒音がスピーカ11から発
生された逆位相音によって打消されて消去される。An audio signal amplified by a speaker amplifier 8 is installed behind the rear seat 10.
1 as sound, and the noise is canceled by the opposite-phase sound generated from the speaker 11 and eliminated.
このように構成された車室同音改質装置における騒音除
去をさらに詳細VC税明する。The noise removal in the cabin homosonic reformer constructed in this manner will be explained in further detail.
本実施例の装置が作動するとマイクロホン3は車室内騒
音PN (j+) (第2A図に照)を吸音して音声信
号[変換し、この音声信号P N (t 1 )はアン
プ4により増幅された後、フィルタ5において予じめ定
められた周波数域の音声信号PIi O+)のみが通過
される(筑2B図参照)。差動アンf6においては、回
路起動時に、減a側の端子6bに電圧が印加され々いの
で、フィルタ5を通過した音声信号pN(tl)はその
まま差動アンプを通過して位相反転回路7において位相
反転される。この位相反転された車内騒音PIN(tl
)がアンプ8を介してスピーカ11から音声信号ρs
(t2) (gjr Z C図翫照)として放出されて
車室内騒音ρN Ct2)と加え合わさjl−MVの除
去が達成される(第2b図参照)。マイクロホン3によ
り車室内騒音PN(t+)が収音された時刻と、この音
声信号PN(t+)の逆相信号”N(t+)が音声信号
Ps (t2)としてスピーカ11から放出される時刻
とU、回路遅蝿の影響により同一であり得ないが、こも
り音等の比較的低周波の騒音の場合はこの遅II!;け
実質的に無視できる。マイクロホン:11次に車室内1
軸音PN(t2)とマイクロボ23位置におけるスピー
カ再生音Ps’(t2)を吸音し、上述と同様にしてフ
ィルタ5を通過する。差動アンプ6において、このフィ
ルタ5を通過した音声信号PN (t2)+Ps’ (
t2) からスピーカ11から発生された音声信号ρ5
(t2)が減算される。除去する対象の騒音、即ちフィ
ルタ5の最高周波数が例えば1008Z 以下であると
すると、スピーカ11からマイクロホン3までの距離が
半波長以下であるのでマイクロボ23位置におけるスピ
ーカ再生音Ps’(ts)とスピーカ11位11イにお
けるスピーカ再生音Ps(t2)とはほぼ等しいとみな
せることから差動アンプの出カバPN(t2)となる。When the device of this embodiment is activated, the microphone 3 absorbs the vehicle interior noise PN (j+) (see FIG. 2A) and converts it into an audio signal, and this audio signal PN (t 1 ) is amplified by the amplifier 4. After that, only the audio signal PIi O+) in a predetermined frequency range is passed through the filter 5 (see Figure 2B). In the differential amplifier f6, a voltage is likely to be applied to the terminal 6b on the decreasing a side when the circuit is started, so the audio signal pN(tl) that has passed through the filter 5 passes through the differential amplifier as it is and is sent to the phase inversion circuit 7. The phase is inverted at This phase-inverted vehicle interior noise PIN (tl
) is the audio signal ρs from the speaker 11 via the amplifier 8.
(t2) (see Figure 2b) and is added to the cabin noise ρN Ct2) to achieve the removal of jl-MV (see Figure 2b). The time when the vehicle interior noise PN(t+) is picked up by the microphone 3, and the time when the opposite phase signal "N(t+)" of this audio signal PN(t+) is emitted from the speaker 11 as the audio signal Ps(t2). Although it cannot be the same due to the influence of circuit delay, this delay can be virtually ignored in the case of relatively low-frequency noise such as muffled sounds.Microphone: 11 Next, the vehicle interior 1
The axial sound PN (t2) and the speaker reproduction sound Ps' (t2) at the position of the microbore 23 are absorbed and passed through the filter 5 in the same manner as described above. In the differential amplifier 6, the audio signal PN (t2)+Ps' (
t2) The audio signal ρ5 generated from the speaker 11
(t2) is subtracted. Assuming that the noise to be removed, that is, the highest frequency of the filter 5, is, for example, 1008Z or less, the distance from the speaker 11 to the microphone 3 is less than half a wavelength, so the speaker reproduction sound Ps'(ts) at the microbo 23 position and the speaker Since it can be considered that it is almost equal to the speaker reproduced sound Ps(t2) in 11th place 11a, it becomes the output cover PN(t2) of the differential amplifier.
この音声信号PN(t2) は位相反転回路7において
位相された鏝スピーカ11がら放出されて次の車室内騒
音PN(ts)とカf]え合わσれて1≠音の除去が行
なわれる。以下同様にして+ll臼次連続的に車室内騒
音が安定して消去される。This audio signal PN(t2) is emitted from the phased speaker 11 in the phase inversion circuit 7, and is combined with the next vehicle interior noise PN(ts) to remove 1≠sound. Thereafter, in the same manner, the noise inside the vehicle is stably suppressed successively after +ll.
次に本発明の効果をよシ明瞭にするため犬鹸結果によ〃
本発明′f:説明する。Next, in order to make the effect of the present invention more clear, we will use the results of dog soap.
Present invention'f: Explain.
実験車両としては、力被う(東洋上業株式会社製造)を
使用し、車室内置を収音するマイクロホンを前方シート
間のヘッドレストに設酷し、車室内置を打消す直径69
cmインピーダンス8Ωのスピーカを右側の後部ウィン
ドVこ品目した、沖室内音改質装置抑の回路としては@
1図および・83図に記載されたものを使用した。46
図は第1図においてブロックにより示された回路を実体
的Vこ示しだものであp、フィルタ5、差ωフアツジ6
、位相反転回路7、バッフ了アンf91f;−全てoP
了ンプカラ溝h!されている。フィルタ5けバンドパス
フィルタであって所望のi、A3波数帯域の音声1河号
のみが除去されるようになっている。木実・倹において
は、マイクロホンで収音された音声1に号のうち5〜1
00 H2の音声(信号のみを通過させるように、フィ
ルタ5の抵(プLおよび答醐の回路定数が決定された。As an experimental vehicle, we used a 69-inch (manufactured by Toyo Jogyo Co., Ltd.) vehicle with a diameter of 69 mm, and installed a microphone that picks up sound from the interior of the vehicle in the headrest between the front seats.
As a circuit for suppressing the Oki indoor sound modification system, a speaker with cm impedance of 8 Ω is installed in the right rear window V.
Those described in Figures 1 and 83 were used. 46
The figure shows the circuit shown by the block in FIG.
, phase inversion circuit 7, buffer completion f91f; - all oP
End of the story! has been done. The filter is a five-piece bandpass filter, and is designed to remove only the audio signal No. 1 in the desired i and A3 wave number bands. In Kimi/Sample, 5 to 1 of the issues are recorded in the voice 1 picked up by the microphone.
The circuit constants of the resistor and the resistor of the filter 5 were determined so as to pass only the audio (signal) of 00H2.
また差1助アンf6の入力端子6a、6bには+J]’
変抵抗が設けられており、減算割合がA整されるように
なっている。このように構成配置された車室内置改質装
置t’j k使用した」81合と、使用しない場合とで
のエンジンのアイドル4転時に発生前れるこもり音を測
定した。In addition, +J]' is applied to the input terminals 6a and 6b of the differential amplifier f6.
A variable resistance is provided so that the subtraction ratio is adjusted to A. The muffled noise before the engine idle was measured when the in-vehicle reformer t'jk constructed and arranged as described above was used and when it was not used.
’It 4 A図および第4B図に6fll定結呆を示
す。第4A図および第4B図はそれぞれエンジン1次音
およびエンジン2次音に関するこもり野の音圧レベルを
トラッキング分骨周波とエンジン回転速度に対して示し
たものであり、図中実線が本発明の車室内蒔改質装j6
を用いた場合、点線が本発明の車室内置改質装置4を用
いない場合の音圧レベルを示す。'It 4 Figures 4A and 4B show 6fll fixed failure. FIG. 4A and FIG. 4B show the sound pressure level of the muffled field regarding the engine primary sound and the engine secondary sound, respectively, with respect to the tracking bone frequency and the engine rotation speed, and the solid line in the diagram shows the sound pressure level of the muffled field regarding the engine primary sound and the engine secondary sound, respectively, and the solid line in the diagram shows Vehicle interior maki reformer j6
The dotted line indicates the sound pressure level when the in-vehicle reformer 4 of the present invention is not used.
第4A図および44B図から明1僚なように本発明の装
ぽを1史用するとエンジン1次汁、2次音欣分のアイド
ルこもり音を少なくとも8〜53 Hz(エンジン回転
速度500〜1600rpm)のイr6囲で大幅に改鋳
14j来、ピークレベル103d8r、(92dB 以
下とすることが出来た。As can be seen from FIGS. 4A and 44B, when the device of the present invention is used for one period, the muffled idle noise of the engine's primary fluid and secondary sound will be reduced to at least 8 to 53 Hz (at an engine speed of 500 to 1600 rpm). ), the peak level was reduced to 103d8r, (92dB or less) due to the significant recasting 14j.
なお、本発明の車室内置改質装置6ケ溝する回路部品と
により高速動作を♀□テなうもの全使用し、かつフィル
タのP波周波数域を変化することにょシより高周波のノ
イズ例えば)見切−tk等をも1余去することが可能と
なる。また、フィルタとしてバンド・やスフィルタの他
にロー・セスフィルタを使用できることは言うまでもな
い。It should be noted that the in-vehicle reformer of the present invention has 6 grooved circuit parts to achieve high-speed operation, and by changing the P-wave frequency range of the filter, it is possible to eliminate high-frequency noise such as ) It becomes possible to leave out 1 even for ``kiri-tk'' and the like. It goes without saying that a low-pass filter can be used as a filter in addition to a band-pass filter.
(発明の効果)
本発明においては2こもり音等の・鐘音となる正室内音
(、この車室内性と位相の音響−を加えることに、より
車室内野を木質的に消去あ゛るいは低θ・kしようとし
た場合に生じる車室内置の消去、非消去の繰り返えしが
発生せず安定して車室内置を消去あるいは低減すること
ができ、車体!14造等に特別な改造を施す必要がなく
、極めて有効な不快庁対策を安価に行なうことができる
。(Effects of the Invention) In the present invention, by adding 2 muffled sounds, etc., and a bell sound, the sound inside the vehicle interior and the phase sound, the interior of the vehicle interior can be eliminated in a woody manner. It is possible to stably erase or reduce the interior of the vehicle without the repetition of erasure and non-erasure of the interior of the vehicle that occurs when trying to lower θ・k, and it is specially designed for vehicles with 14 construction. There is no need to make any major modifications, and an extremely effective measure against discomfort can be taken at a low cost.
49図面の1’/ij単な、脱明
2g1図は本発明の車搦内音改音装麓の一実施例を示す
概略図、
g2A図、42日図および42C図はそれぞれ、′ル1
図において示される波形図、
第6図は□lJ’y 1図においてブロックにより示さ
れた回路を実体的に示した回路図、
第4A図および第4B図番1本発明によって得られた測
定結果を示すグラフである。Figure 1'/ij of Figure 49 is a schematic diagram showing an embodiment of the sound reforming system in the vehicle roof according to the present invention;
Figure 6 is a circuit diagram substantively showing the circuit indicated by the block in Figure 1. Figure 4A and Figure 4B No. 1 Measurement results obtained by the present invention This is a graph showing.
Claims (1)
るマイクロフォンと、該音声信号から予め定められた周
波数域の音声信号を取り出すフィルタ手段と、該フィル
タ手段を通過した音声信号を逆位相とする位相反転手段
と、該位相反転手段により反転きれた音声信号を車室内
に発するスピーカと、前記フィルタ手段と4+記位相反
転手段との間に設けられ前記位相反転手段に入力される
音声信号から前記スピーカから発生された音声信号を減
じる減算回路とが備えられたこと全特徴とする東室内音
改質装置。A microphone installed in the vehicle interior picks up the sounds inside the vehicle and converts them into audio signals; a filter means extracts an audio signal in a predetermined frequency range from the audio signal; and a filter means inverts the audio signal that has passed through the filter means. a speaker for emitting an audio signal inverted by the phase inversion means into the vehicle interior; and a speaker provided between the filter means and the phase inversion means 4+ to input the audio signal to the phase inversion means. A subtraction circuit for subtracting the audio signal generated from the speaker from the signal.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP59040075A JPS60183900A (en) | 1984-03-02 | 1984-03-02 | Device for improving sound in automobile |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP59040075A JPS60183900A (en) | 1984-03-02 | 1984-03-02 | Device for improving sound in automobile |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS60183900A true JPS60183900A (en) | 1985-09-19 |
Family
ID=12570803
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP59040075A Pending JPS60183900A (en) | 1984-03-02 | 1984-03-02 | Device for improving sound in automobile |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS60183900A (en) |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5979962A (en) * | 1994-06-10 | 1999-11-09 | Stankiewicz Gmbh | Load floor lining having integrated sound insulation |
WO2000014722A1 (en) * | 1998-09-04 | 2000-03-16 | Ultra Electronics Limited | Adjustable quiet seat |
FR2839602A1 (en) * | 2002-05-13 | 2003-11-14 | Claude Bernard Roch Carpentier | Car improved stereophonic sound reproduction having sound correction process allowing inversion electrical phase where opposition phase listening position detected between channels. |
EP2629289A1 (en) * | 2012-02-15 | 2013-08-21 | Harman Becker Automotive Systems GmbH | Feedback active noise control system with a long secondary path |
US9088842B2 (en) | 2013-03-13 | 2015-07-21 | Bose Corporation | Grille for electroacoustic transducer |
US9327628B2 (en) | 2013-05-31 | 2016-05-03 | Bose Corporation | Automobile headrest |
US9699537B2 (en) | 2014-01-14 | 2017-07-04 | Bose Corporation | Vehicle headrest with speakers |
JP2021011132A (en) * | 2019-07-04 | 2021-02-04 | トヨタ紡織株式会社 | Vehicular soundproof device |
-
1984
- 1984-03-02 JP JP59040075A patent/JPS60183900A/en active Pending
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5979962A (en) * | 1994-06-10 | 1999-11-09 | Stankiewicz Gmbh | Load floor lining having integrated sound insulation |
WO2000014722A1 (en) * | 1998-09-04 | 2000-03-16 | Ultra Electronics Limited | Adjustable quiet seat |
FR2839602A1 (en) * | 2002-05-13 | 2003-11-14 | Claude Bernard Roch Carpentier | Car improved stereophonic sound reproduction having sound correction process allowing inversion electrical phase where opposition phase listening position detected between channels. |
WO2004002194A1 (en) * | 2002-05-13 | 2003-12-31 | Claude Carpentier | Device for stereophonic reproduction in a vehicle and a vehicle equipped thus |
EP2629289A1 (en) * | 2012-02-15 | 2013-08-21 | Harman Becker Automotive Systems GmbH | Feedback active noise control system with a long secondary path |
US9088842B2 (en) | 2013-03-13 | 2015-07-21 | Bose Corporation | Grille for electroacoustic transducer |
US9327628B2 (en) | 2013-05-31 | 2016-05-03 | Bose Corporation | Automobile headrest |
US9699537B2 (en) | 2014-01-14 | 2017-07-04 | Bose Corporation | Vehicle headrest with speakers |
JP2021011132A (en) * | 2019-07-04 | 2021-02-04 | トヨタ紡織株式会社 | Vehicular soundproof device |
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