CN102918872B - 扬声器 - Google Patents
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- 239000000126 substance Substances 0.000 claims description 2
- 238000009432 framing Methods 0.000 description 11
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- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 3
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
- H04R1/22—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only
- H04R1/28—Transducer mountings or enclosures modified by provision of mechanical or acoustic impedances, e.g. resonator, damping means
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
- H04R1/22—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
- H04R1/22—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only
- H04R1/28—Transducer mountings or enclosures modified by provision of mechanical or acoustic impedances, e.g. resonator, damping means
- H04R1/2869—Reduction of undesired resonances, i.e. standing waves within enclosure, or of undesired vibrations, i.e. of the enclosure itself
- H04R1/2876—Reduction of undesired resonances, i.e. standing waves within enclosure, or of undesired vibrations, i.e. of the enclosure itself by means of damping material, e.g. as cladding
- H04R1/288—Reduction of undesired resonances, i.e. standing waves within enclosure, or of undesired vibrations, i.e. of the enclosure itself by means of damping material, e.g. as cladding for loudspeaker transducers
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
- H04R1/32—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only
- H04R1/34—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by using a single transducer with sound reflecting, diffracting, directing or guiding means
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
- H04R1/32—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only
- H04R1/34—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by using a single transducer with sound reflecting, diffracting, directing or guiding means
- H04R1/345—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by using a single transducer with sound reflecting, diffracting, directing or guiding means for loudspeakers
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
- H04R1/22—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only
- H04R1/30—Combinations of transducers with horns, e.g. with mechanical matching means, i.e. front-loaded horns
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- Health & Medical Sciences (AREA)
- Otolaryngology (AREA)
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
- Obtaining Desirable Characteristics In Audible-Bandwidth Transducers (AREA)
Abstract
一种扬声器,包括壳体和安装在所述壳体中的膜,该膜能够被置于振动状态从而产生声音,其中,扬声器具有在膜与壳体的外侧之间延伸的至少一个声音通道,并且其中,在声音通道中设置有一个或多个局部声音屏障,该声音屏障局部地阻挡声音通道的横截面面积的至少15%,从而由于共振而在可听频率范围内发生声压的放大。
Description
技术领域
本发明涉及一种扬声器,该扬声器包括壳体以及安装在所述壳体中的膜(membrane),该膜能够被设置成振动从而产生声音,所述扬声器具有在膜和壳体的外侧之间延伸的至少一个声音通道(soundchannel)。这样的扬声器通常是已知的。
背景技术
US2004/0,047,488描述了在声音通道中设置有透声格栅(acousticallytransparentgrill)的扬声器,并且因此并未描述根据本发明的声音屏障。
发明内容
本发明的目的是提供一种在引言中所述种类的扬声器,其比已知的扬声器具有更好的机械和/或声学性能。
根据本发明,为了这个目的,在声音通道中设置一个或多个局部声音屏障(soundbarrier,声障),该声音屏障局部地阻挡声音通道的至少15%的横截面面积。声音屏障将在特定频率范围内的音量放大至相当大的程度,这转而使得在其他频率范围内或者甚至在不可听见的频率范围内的损失可忽略。
优选地,这些声音屏障局部地阻挡声音通道的横截面面积(cross-sectionalarea,横截面区域)的25%到75%之间,更优选地介于35%到65%之间,甚至更优选地介于40%到60%之间。优选地,声音通道的宽度为6-10mm,更优选地为7-9mm,并且优选地,沿着间隙的长度来看,声音屏障局部地平均阻挡声音通道的横截面区域的至少0.8mm,更优选地2-6mm,甚至更优选地2.8-5.2mm。声音屏障的厚度优选地为0.5-10mm,更优选地为1-8mm,甚至更优选地为2-6mm。
在声音通道中,这些声音屏障优选地被放置于更接近于声音通道的靠近膜的端部的位置处,这是相比于声音通道的靠近壳体外侧的另一个端部而言,更优选地,声音屏障被放置于声音通道的靠近膜的端部处。
声音通道优选地是间隙状的(gap-shaped,缝隙状的),所述一个或多个声音屏障基本上沿着声音通道的间隙的整个长度设置。声音通道优选地具有基本上平行的壁。在优选实施方式中,这些声音屏障由沿间隙的纵向方向延伸的一个或多个梁(beam)形成。更优选地,这些声音屏障由在声音通道的横截面的中央沿间隙的纵向方向延伸的一个梁形成。
声音屏障优选地由非磁性材料制成,更优选地由不锈钢、黄铜、铝或铜制成,更优选地由铜制成。以这样的方式实现的附加效果是声音屏障有助于热量的有效消散。这种效果特别是发生在如果声音屏障被布置为靠近膜时。
膜优选地是安装在框架中的柔性膜。优选地,扬声器包括产生磁场的磁体单元,并且膜设置有布置在膜上的图案(pattern,图样)中的电导体,该膜以这样的方式放置在磁场中,即当电流流过导体图案时,力作用在膜上,该力能够使膜运动。优选地,导体图案设置在膜上的至少两个隔开的振动区域中,同时扬声器具有在两个振动区域与壳体外侧之间延伸的至少两个声音通道。
附图说明
现在参照附图所示的一个实施方式详细阐述本发明,附图中:
图1是扬声器的部分透视图;
图2是膜单元的透视图;
图3是图1的扬声器的横截面视图;
图4是图1的扬声器的横截面视图,其上安装有声音喇叭;
图5是根据本发明的扬声器的横截面视图;
图6示出了根据本发明的声音屏障的宽度(w)对不同频率的声音强度的影响的曲线图;以及
图7示出了根据本发明的声音屏障的厚度(t)对不同频率的声音强度的影响的曲线图;
图8和图9说明了对本发明的不同实施方式的声质量(MA,acousticmass)的确定。
具体实施方式
根据图1,扬声器包括由两个基本上相同的金属部件1、2组成的壳体,这两个金属部件通过螺钉3安装在一起。每个壳体部件1、2均具有两个细长狭槽形的凹槽或声音通道4、5,它们将在扬声器中产生的声音传导至外界。此外,壳体部件1设置有电连接点6、7,扩音器(amplifier,放大器)的声音信号线能够连接至该电连接点。壳体1、2设置有向外、纵向延伸的散热片8,用于使在扬声器中产生的热量消散。
壳体部件1、2装入图2所示的框架,该框架由第一框形框架构件9和两个条形框架构件10、11组成。框架构件9、10、11优选地由铜或阳极氧化铝制成。框架构件9、10、11的外部表面整个与壳体1、2接触。扁平振动膜12通过胶或通过薄的双面胶带而贴附至框架构件9。胶或者胶带是热传导型的。在膜12上设置有电导体图案(electricalconductorpattern)13,该电导体图案连接至连接点6、7,并且当扩音器将电信号传送至扬声器时使膜振动。
为了这个目的,如图3所示,扬声器包括产生永久磁场的磁体13,膜12的导体图案14位于该磁场中。导体图案14由设置在膜12的一侧上的细长、矩形螺旋中的电传导路径而形成。在矩形图案的短侧上,框架构件10、11直接设置在导体图案上。因此,胶或者胶带(框架构件通过其贴附至导线)必须是电绝缘的。在膜12的另一侧上,图案的所述短侧类似地被框形框架构件9的短侧所覆盖。从而在这种情况下,导体图案14能够将两侧上的热量传递至框架构件9、10、11。
导线的两个端部连接至框架构件10上的导体接线端(conductorterminal)15、16,该导体接线端转而电连接至连接点6、7。导体接线端15、16与框架构件10电绝缘。导体图案14的线(其在纵向方向上在框架构件10、11之间彼此平行地延伸)形成两个隔开的振动区域17、18。
参照图3,声音通道4、5从在膜12表面上的两个隔开的振动区域17、18处向壳体部件1、2的外侧延伸,然而,封闭板27将该声音通道4、5在一侧上封闭,因为扬声器必须将声音仅发射至一侧。如图5所示,通道在后侧上填充由合成泡沫制成的阻尼器24、25,从而吸收发射至后面的声音。在远离膜的方向上看去,声音通道4、5首先与膜垂直地延伸,即在磁体13之间的区域中,并且随后声音通道4、5朝着彼此倾斜。每个声音通道4、5的外壁19和内壁20两者朝着彼此倾斜,而各声音通道4、5的内壁19和外壁20之间的平行关系保持不变。在扬声器的外侧,在两个声音通道4、5的内壁19之间仅保留了非常小的间隔,所述间隔比振动区域17、18之间的间隔至少小好几倍。这样,由两个振动区域17、18产生的声波的前部被引导为朝向彼此并且结合在一起,从而防止在两个波前之间的不利干扰。
图4示出了声音喇叭21,其通过螺钉23安装在扬声器的螺纹孔24中。声音通道4、5的外壁19连接声音喇叭21的壁22。从声音通道4、5出来的声音前部在进一步扩展至环境中之前,声音喇叭21为其提供逐渐的扩展。喇叭(其由金属制成)还有助于扬声器的热量消散。
图5示出了根据本发明的扬声器,其与上述的扬声器相同,但具有以下改变。在每个通道4、5中,在膜12和壳体2的外侧之间放置有铜梁(copperbeam)26。梁26形成用于由膜12产生的声音的声音屏障。梁26沿着通道4、5的整个长度延伸。在横向方向上看,梁26在通道4、5的中央延伸,从而在梁26的每侧上形成相同的间隙状开口,来自膜的声音可以通过该开口到达通道4、5。通道4、5的宽度是8mm,梁26的宽度(w)是4mm,使得通道的横截面面积的50%被梁阻挡。梁26的厚度(t)是4mm。
在声音通道4、5中的声音屏障的形状也可以是不同的,其中可以考虑在纵向方向上或横向方向上设置连接穿孔板或几个梁。已发现这里所示的实施方式是最有效的实施方式。
通过在膜12的前方设置一些声音屏障,由于共振会发生声压的放大。所述共振的发生是由声质量(MA)与膜上的导体图案的前方空气的声顺(CA,acousticcompliance)的共振而导致的。声质量定义为:空气质量/(面积的平方),或MA=m/(A∧2)。在确定空气质量(m)时,须将在声音屏障的前侧和后侧上延伸的半圆柱形空气质量的端部校正(见图8和图9)考虑进去。
共振频率(fb)定义为:
使用上式,可以预测诸如梁26的声音屏障的多个方面的影响,从而实现声音在可听范围内的放大,并且通过以下多个实施方式的测试结果确认所述预测。
宽度:图6示出了,如果通道的阻挡量达到10%(0.8mm)(厚度(t)为4mm),在15kHz附近范围内会发生大约0.8dB的放大。最大放大发生在阻挡量达到大约50%(4mm)时,在这种情况下,放大大于3dB。如果阻挡量大于50%,共振减弱。
厚度:图7示出了,如果通道中的阻挡相对薄(这个实例中是0.8mm)(宽度(w)为4mm),这会导致在15kHz附近范围内大约1dB的放大,最大放大发生在20kHz以上的(不可听)范围内。在厚度为4mm的情况下,放大超过3dB。总体上,可以说阻挡越厚,具有最大放大的峰值频率越低。增大厚度导致频率衰减,具有高空气速度(在这个实例中大约为3kHz)。
位置:测试已显示,如果将阻挡放置得尽可能靠近膜而实现最大的效果。
形状:测试已显示,放大效果随着开口数量(例如在格栅的情况下)增加而减小。由此,在这个实施方式中使用了在通道(两个开口)的宽度的中央处的梁。
Claims (12)
1.一种扬声器,包括壳体(1、2)和安装在所述壳体中的膜,所述膜能够被置于振动状态从而产生声音,所述扬声器具有在所述膜(12)与所述壳体(1、2)的外侧之间延伸的至少一个声音通道(4、5),其特征在于,在所述声音通道(4、5)中设置有一个或多个局部声音屏障(26),所述声音屏障局部地阻挡所述声音通道(4、5)的横截面面积的至少15%,从而由于共振而在可听频率范围内发生声压的放大,其中,所述声音屏障(26)被放置于在所述声音通道(4、5)中的更接近于所述声音通道的靠近所述膜(12)的端部的位置处,这是相比于所述通道(4、5)的靠近所述壳体(1、2)的外侧的另一个端部而言。
2.根据权利要求1所述的扬声器,其中,所述声音屏障(26)局部地阻挡所述声音通道(4、5)的横截面面积的25%到75%之间。
3.根据权利要求1或2所述的扬声器,其中,所述声音通道(4、5)的宽度为6–10mm,并且所述声音屏障(26)平均局部地阻挡所述声音通道(4、5)的横截面面积的至少0.8mm。
4.根据权利要求1或2所述的扬声器,其中,所述声音屏障(26)的厚度为0.5–10mm。
5.根据权利要求1或2所述的扬声器,其中,所述声音屏障(26)被放置于所述声音通道(4、5)的靠近所述膜(12)的端部处。
6.根据权利要求1或2所述的扬声器,其中,所述声音通道是间隙状的,所述一个或多个声音屏障基本上沿着所述声音通道(4、5)的间隙的整个长度设置。
7.根据权利要求6所述的扬声器,其中,所述声音屏障(26)由沿所述间隙的纵向方向延伸的一个或多个梁形成。
8.根据权利要求6所述的扬声器,其中,所述声音屏障(26)由在所述声音通道(4、5)的横截面的中央沿所述间隙的纵向方向延伸的梁形成。
9.根据权利要求1或2所述的扬声器,其中,所述声音屏障(26)由非磁性材料制成。
10.根据权利要求1或2所述的扬声器,其中,所述通道(4、5)的壁基本上平行于彼此延伸。
11.根据权利要求1或2所述的扬声器,其中,所述膜(12)是安装在框架(9、10、11)中的柔性膜。
12.根据权利要求11所述的扬声器,其中,在所述膜(12)上的至少两个隔开的振动区域(17、18)中设置有导体图案(14),其中,所述扬声器具有在两个振动区域(17、18)与所述壳体(1、2)的外侧之间延伸的至少两个声音通道(4、5)。
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NL2004781A NL2004781C2 (nl) | 2010-05-31 | 2010-05-31 | Luidspreker. |
NL2004781 | 2010-05-31 | ||
PCT/NL2011/050373 WO2011152718A1 (en) | 2010-05-31 | 2011-05-27 | Loudspeaker |
Publications (2)
Publication Number | Publication Date |
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CN102918872A CN102918872A (zh) | 2013-02-06 |
CN102918872B true CN102918872B (zh) | 2016-03-09 |
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CN201180027222.7A Active CN102918872B (zh) | 2010-05-31 | 2011-05-27 | 扬声器 |
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US (1) | US9100750B2 (zh) |
EP (1) | EP2577986B1 (zh) |
KR (1) | KR101866584B1 (zh) |
CN (1) | CN102918872B (zh) |
CA (1) | CA2801141C (zh) |
CY (1) | CY1116501T1 (zh) |
DK (1) | DK2577986T3 (zh) |
EA (1) | EA024089B1 (zh) |
ES (1) | ES2543065T3 (zh) |
HU (1) | HUE026783T2 (zh) |
NL (1) | NL2004781C2 (zh) |
PL (1) | PL2577986T3 (zh) |
PT (1) | PT2577986E (zh) |
SI (1) | SI2577986T1 (zh) |
WO (1) | WO2011152718A1 (zh) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
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WO2014100012A1 (en) * | 2012-12-20 | 2014-06-26 | The Regents Of The University Of California | Electrostatic graphene speaker |
US9843862B2 (en) * | 2015-08-05 | 2017-12-12 | Infineon Technologies Ag | System and method for a pumping speaker |
NL2023714B1 (en) * | 2019-08-27 | 2021-04-13 | If Adamas B V | Speaker-element and speaker comprising such a speaker-element |
CN111800681B (zh) * | 2020-06-30 | 2022-04-19 | 深圳易科声光科技股份有限公司 | 声音压缩导向装置 |
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-
2011
- 2011-05-27 PT PT117237487T patent/PT2577986E/pt unknown
- 2011-05-27 WO PCT/NL2011/050373 patent/WO2011152718A1/en active Application Filing
- 2011-05-27 SI SI201130528T patent/SI2577986T1/sl unknown
- 2011-05-27 EA EA201291325A patent/EA024089B1/ru not_active IP Right Cessation
- 2011-05-27 US US13/700,825 patent/US9100750B2/en active Active
- 2011-05-27 KR KR1020127034077A patent/KR101866584B1/ko active IP Right Grant
- 2011-05-27 EP EP20110723748 patent/EP2577986B1/en active Active
- 2011-05-27 ES ES11723748.7T patent/ES2543065T3/es active Active
- 2011-05-27 PL PL11723748T patent/PL2577986T3/pl unknown
- 2011-05-27 CN CN201180027222.7A patent/CN102918872B/zh active Active
- 2011-05-27 CA CA2801141A patent/CA2801141C/en active Active
- 2011-05-27 DK DK11723748.7T patent/DK2577986T3/en active
- 2011-05-27 HU HUE11723748A patent/HUE026783T2/en unknown
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2015
- 2015-07-13 CY CY20151100610T patent/CY1116501T1/el unknown
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Also Published As
Publication number | Publication date |
---|---|
KR20130111975A (ko) | 2013-10-11 |
PT2577986E (pt) | 2015-07-21 |
CA2801141A1 (en) | 2011-12-08 |
CA2801141C (en) | 2019-09-10 |
CN102918872A (zh) | 2013-02-06 |
DK2577986T3 (en) | 2015-08-03 |
WO2011152718A1 (en) | 2011-12-08 |
CY1116501T1 (el) | 2017-03-15 |
HUE026783T2 (en) | 2016-07-28 |
NL2004781C2 (nl) | 2011-12-01 |
PL2577986T3 (pl) | 2015-10-30 |
US20130195305A1 (en) | 2013-08-01 |
EP2577986B1 (en) | 2015-04-29 |
EA024089B1 (ru) | 2016-08-31 |
US9100750B2 (en) | 2015-08-04 |
ES2543065T3 (es) | 2015-08-14 |
SI2577986T1 (sl) | 2015-07-31 |
EA201291325A1 (ru) | 2013-06-28 |
EP2577986A1 (en) | 2013-04-10 |
KR101866584B1 (ko) | 2018-06-11 |
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