EP2288177B1 - Frontresonator für einen Lautsprecher einer drahtlosen Vorrichtung - Google Patents

Frontresonator für einen Lautsprecher einer drahtlosen Vorrichtung Download PDF

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Publication number
EP2288177B1
EP2288177B1 EP09168256.7A EP09168256A EP2288177B1 EP 2288177 B1 EP2288177 B1 EP 2288177B1 EP 09168256 A EP09168256 A EP 09168256A EP 2288177 B1 EP2288177 B1 EP 2288177B1
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EP
European Patent Office
Prior art keywords
tube
trough
resonator
speaker
wireless device
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.)
Active
Application number
EP09168256.7A
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English (en)
French (fr)
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EP2288177A1 (de
Inventor
Gunther Burghardt
Markus Thrien
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BlackBerry Ltd
Original Assignee
Research in Motion Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Research in Motion Ltd filed Critical Research in Motion Ltd
Priority to EP09168256.7A priority Critical patent/EP2288177B1/de
Priority to EP13154777.0A priority patent/EP2595409A3/de
Priority to CA2711351A priority patent/CA2711351C/en
Publication of EP2288177A1 publication Critical patent/EP2288177A1/de
Application granted granted Critical
Publication of EP2288177B1 publication Critical patent/EP2288177B1/de
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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
    • H04R1/2807—Enclosures comprising vibrating or resonating arrangements
    • H04R1/2838—Enclosures comprising vibrating or resonating arrangements of the bandpass type
    • H04R1/2842—Enclosures comprising vibrating or resonating arrangements of the bandpass type for loudspeaker transducers
    • 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
    • H04R1/2807—Enclosures comprising vibrating or resonating arrangements
    • H04R1/2838—Enclosures comprising vibrating or resonating arrangements of the bandpass type
    • H04R1/2846—Vents, i.e. ports, e.g. shape thereof or tuning thereof with damping material
    • H04R1/2849—Vents, i.e. ports, e.g. shape thereof or tuning thereof with damping material for loudspeaker transducers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2499/00—Aspects covered by H04R or H04S not otherwise provided for in their subgroups
    • H04R2499/10—General applications
    • H04R2499/11—Transducers incorporated or for use in hand-held devices, e.g. mobile phones, PDA's, camera's

Definitions

  • This application relates to the field of wireless devices, and more specifically, to a front resonator for a speaker of a wireless device.
  • Current wireless mobile communication devices include microprocessors, memory, soundcards, speakers, headphones, and run one or more software applications in addition to providing for voice communications.
  • Published EP 1 916 869 discloses a back resonator for a speaker of a wireless device where the back resonater consists in a tristed tube mounted auto the inner surface of the enclosure.
  • the front resonator typically consists of a tube coupled to a front volume which is located in front of the speaker. Sound generated by the speaker travels through the front volume, through the tube, and into the air surrounding the wireless device where it is received by a user's ear.
  • the tube and front volume are sized to obtain a desired frequency response.
  • the size (e.g., length, volume, etc.) of the tube and/or front volume may have to be adjusted.
  • an increase in the length of the tube for example, will increase the thickness of the wireless device thus increasing the overall size of the wireless device, which is not desirable.
  • FIG. 1 is a front view illustrating a wireless device in accordance with an embodiment of the application
  • FIG. 2 is a block diagram illustrating the wireless device of FIG. 1 ;
  • FIG. 3 is a block diagram illustrating a memory of the wireless device of FIG. 1 ;
  • FIG. 4 is a front view illustrating a front resonator for the wireless device of FIG. 1 in accordance with an embodiment of the application;
  • FIG. 5 is a back view illustrating the front resonator of FIG. 4 ;
  • FIG. 6 is a bottom view illustrating the front resonator of FIG. 4 ;
  • FIG. 7 is a left side view illustrating the front resonator of FIG. 4 ;
  • FIG. 8 is a front cross-sectional perspective view illustrating the front resonator of FIG. 4 ;
  • FIG. 9 is a bottom cross-sectional view illustrating the front resonator of FIG. 4 ;
  • FIG. 10 is a left side cross-sectional view illustrating the front resonator of FIG. 4 ;
  • FIG. 11 is a horizontal cross-sectional view illustrating the front resonator of FIG. 4 mounted in the wireless device of FIG. 1 ;
  • FIG. 12 is a partial cross-sectional perspective view illustrating the front resonator of FIG. 4 mounted in the wireless device of FIG. 1 ;
  • FIG. 13 is a partial perspective view (outlet mesh and foam ring removed) illustrating the front resonator of FIG. 4 mounted in the wireless device of FIG. 1 ;
  • FIG. 14 is a partial perspective view illustrating an outlet mesh and foam ring mounted over the front resonator of FIG. 4 mounted in the wireless device of FIG. 1 .
  • FIG. 1 is a front view illustrating a wireless device 100 in accordance with an embodiment of the application.
  • the wireless device 100 includes a cover or case 150, a display (e.g., a liquid crystal display (“LCD”)) 122, a graphical user interface ("GUI") 180 displayed on the display 122, a speaker 134, a keyboard (or keypad) 132, a thumbwheel (or trackwheel) 110, various select buttons 120, and various inputs/outputs (e.g., power connector jack, data interface ports, headphones jack, etc.) 160.
  • the wireless device 100 typically includes one or more circuit boards (not shown in FIG.
  • FIG. 2 is a block diagram illustrating the wireless device 100 of FIG. 1 .
  • the wireless device 100 may operate over a wireless network 220.
  • the wireless network 220 may include antenna, base stations, access points, transceivers, supporting radio equipment, etc., as known to those of ordinary skill in the art, for supporting wireless communications between the wireless device 100 and other devices (not shown).
  • the wireless device 100 may be a two-way communication device having at least voice and advanced data communication capabilities, including the capability to communicate with other devices. Depending on the functionality provided by the device 100, it may be referred to as a data messaging device, a two-way pager, a cellular telephone with data messaging capabilities, a wireless Internet appliance, a data communication device (with or without telephony capabilities), a Wi-Fi device, a WLAN device, a dual-mode (i.e., Wi-Fi and cellular) device, or a portable audio device.
  • the device 100 may communicate with any one of a plurality of transceiver stations (not shown) within its geographic coverage area.
  • the wireless device 100 may have a communication subsystem 111, a subscriber identity module (or "SIM” card) 162 for inserting into a SIM interface (“IF") 164 in order to operate on a cellular network (e.g., a global system for mobile communication (“GSM”) network), a battery IF 154 for receiving one or more rechargeable batteries 156, a microprocessor 138 which controls overall operation of the device 100, a flash memory 124 or other persistent store, a random access memory (“RAM”) 126, auxiliary input/output (“I/O”) subsystems 128, a serial port (e.g., a universal serial bus (“USB”) port) 131, a microphone 136, a short-range communications subsystem 141, and other device subsystems 142.
  • SIM subscriber identity module
  • FIG. 3 is a block diagram illustrating a memory 200 of the wireless device 100 of FIG. 1 .
  • the microprocessor 138 is coupled to the memory 200.
  • the memory 200 has various hardware and software components for storing information (e.g., instructions, data, database tables, test parameters, etc.) for enabling operation of the device 100 and may include flash memory 124, RAM 126, ROM (not shown), disk drives (not shown), etc.
  • the memory 200 may include a variety of storage devices typically arranged in a hierarchy of storage as understood to those skilled in the art.
  • operating system software modules 202 resident on the device 100 may provide a basic set of operations for supporting various applications typically operable through the GUI 180 and supporting GUI software modules 204.
  • the wireless device 100 may be provided with additional hardware and/or software modules 206 for facilitating and implementing various functions.
  • FIG. 4 is a front view illustrating a front resonator 400 for the wireless device 100 of FIG. 1 in accordance with an embodiment of the application.
  • FIG. 5 is a back view illustrating the front resonator 400 of FIG. 4 .
  • FIG. 6 is a bottom view illustrating the front resonator 400 of FIG. 4 .
  • FIG. 7 is a left side view illustrating the front resonator 400 of FIG. 4 .
  • FIG. 8 is a front cross-sectional perspective view illustrating the front resonator 400 of FIG. 4 .
  • FIG. 9 is a bottom cross-sectional view illustrating the front resonator 400 of FIG. 4 .
  • FIG. 10 is a left side cross-sectional view illustrating the front resonator 400 of FIG. 4 .
  • the front resonator 400 includes a frame or enclosure 410 into which a panel or plate 420 is inserted.
  • the enclosure 410, plate 420, and an upper surface 1100 of the speaker 134 form a front volume 900 for the speaker 134.
  • the plate 420 has a groove, channel, or trough 800 formed in an upper surface 421 of the plate 420 such that when the plate 420 is inserted into the enclosure 410, a duct, conduit, or tube 910 is formed between an inner surface 411 of the enclosure 410 and the upper surface 421 of the plate 420.
  • An opening 500 formed in the plate 420 proximate the center of the trough 800 couples the tube 910 to the front volume 900.
  • sound generated by the speaker 134 travels through the front volume 900, through the central opening 500 in the plate 420 and into the tube 910, through the tube 910, and out through the openings 430, 440 in the enclosure 410 over each end 530, 540 of the trough 800.
  • the tube 910 may be considered as including first and second sections (or tubes) 531, 541, each section (or tube) 531, 541 having a first end 530, 540 and an associated opening 430, 440 into the external environment and a second end 532, 542 having an opening 500 into the front volume 900.
  • FIG. 11 is a horizontal cross-sectional view illustrating the front resonator 400 of FIG. 4 mounted in the wireless device 100 of FIG. 1 .
  • FIG. 12 is a partial cross-sectional perspective view illustrating the front resonator 400 of FIG. 4 mounted in the wireless device 100 of FIG. 1 .
  • FIG. 13 is a partial perspective view (outlet mesh 1110, dust net 1120, and foam ring 1130 removed) illustrating the front resonator 400 of FIG. 4 mounted in the wireless device 100 of FIG. 1 .
  • FIG. 14 is a partial perspective view illustrating an outlet mesh 1110 and foam ring 1120 mounted over the front resonator 400 of FIG. 4 mounted in the wireless device 100 of FIG. 1 .
  • a foam ring 1120, dust net 1120, and/or outlet mesh 1110 may be provided over the front resonator 400 when it is mounted in the wireless device 100 to protect the front resonator 400 and speaker 134.
  • the speaker 134 is a dynamic speaker (e.g., a cone and magnet speaker).
  • the front resonator 400 may be used in conjunction with a microphone or loud speaker.
  • the edges of the enclosure 410 and plate 420 are rounded to reduce turbulence and to ease manufacturing tolerances.
  • the enclosure 410 and plate 420 are made of metal and are welded or glued together.
  • the enclosure 410 and plate 420 may be made of plastic.
  • each section 531, 541 of the tube 910 is approximately 0.4 mm high, by 1.2 mm wide, by 2.5 mm long and the front volume 900 is approximately 40 mm 3 .
  • the front resonator 400 may include two or more tubes 910.
  • the tube 910 may be formed or mounted on an outer surface 412 of the frame or enclosure 410.
  • a front resonator 400 for a speaker 134 of a wireless device 100 comprising: an enclosure 410 mounted over the speaker 134 and forming with an upper surface 1100 of the speaker 134 a front volume 900 for the front resonator 400; and, a horizontal (e.g., in the x - y plane) or approximately horizontal tube 910 formed or mounted on a surface (e.g., 411) of the enclosure 410, the tube 910 coupled (e.g., 500 ) to the front volume 900, and the tube 910 having at least one end 430, 440 to emit sound generated by the speaker 134 and passing through the front volume 900 and tube 910 from the wireless device 100.
  • a horizontal (e.g., in the x - y plane) or approximately horizontal tube 910 formed or mounted on a surface (e.g., 411) of the enclosure 410 the tube 910 coupled (e.g., 500 ) to the front volume 900, and the tube 910 having at least one end 430,
  • the tube 910 may be horizontal (e.g., in the x - y plane) or approximately horizontal with respect to a vertical axis (e.g., the z - axis) of the front volume 900.
  • the tube 910 may be formed or mounted on an inner surface 411 of the enclosure 410.
  • the tube 910 may be formed by a plate 420 having an upper surface 421 mounted to the inner surface 411 of the enclosure 410, the upper surface 421 of the plate 420 having a trough 800 formed therein, the trough 800 and the inner surface 411 of the enclosure 410 forming the tube 910, the trough 800 having an opening 500 formed therein to couple the front volume 900 to the tube 910, the enclosure 410 having at least one opening 430, 440 formed therein and aligned proximate at least one respective end 530, 540 of the trough 800 to emit sound generated by the speaker 134 and passing through the front volume 900 and tube 910 from the wireless device 100.
  • the trough 800 may be straight.
  • the opening 500 in the trough 800 may be formed proximate a center of the trough 800.
  • the opening 500 in the trough 800 may be formed in a bottom of the trough 800.
  • the trough 800 may have a smooth shape with rounded ends.
  • the at least one opening 430, 440 in the enclosure 410 may have semicircular and rectangular portions aligning with at least one respective end 530, 540 of the trough 800.
  • the opening 500 in the trough 800 may have a rectangular shape.
  • the upper surface 421 of the plate 420, the inner surface 411 of the enclosure 410, the trough 800, and a mounting plane of the speaker 134 may be parallel or approximately parallel.
  • a volume of the front volume 900 and a volume of the tube 910 may be selected to provide a frequency response of approximately 4 kHz.
  • the tube 910 may have first and second sections 531, 541.
  • each of the first and second sections 531, 541 may be approximately 0.4 mm high, by 1.2 mm wide, by 2.5 mm long and the front volume 900 may be approximately 40 mm 3 .
  • the enclosure 410 may have a rounded, rectangular, open box-like shape.
  • the inner surface 411 of the enclosure 410 may be an inner upper surface 411 of the enclosure 410.
  • the plate 420 may be mounted in the enclosure 410 by welding or gluing.
  • the enclosure 410 and the plate 420 may be formed from metal or plastic.
  • the speaker 134 may be a cone and magnet speaker.
  • the speaker 134 and front resonator 400 may be mounted within a case 150 of the wireless device 100.
  • the tube 910 may be one or more tubes 910. And, the tube 910 may be formed or mounted on an outer surface 412 of the enclosure 410.
  • a wireless device 100 having a front resonator 400 as described above.
  • the axis of the tube 910, 531, 541 is arranged horizontally with respect to the front volume 900 rather than vertically.
  • the overall height of the front resonator 400 is reduced and hence the overall thickness of the wireless device 100 may also be reduced.
  • L new / L old V old / V new .
  • V new 0.5 V old
  • L new 2 L old .
  • tube length must be doubled which is not generally implementable in the vertical direction in a wireless device.
  • the tube 910, 531, 541 allows for a further reduction in the overall thickness of the wireless device 100.
  • selected rounding of the edges, corners, and surfaces of the enclosure 410 and plate 420 reduce turbulences and eases manufacturing tolerances. Sixth, the above embodiments may provide one or more of these advantages without significant adverse effect upon speaker performance.

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  • Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Obtaining Desirable Characteristics In Audible-Bandwidth Transducers (AREA)
  • Transceivers (AREA)

Claims (14)

  1. Ein vorderer Resonator (400) für einen Lautsprecher (134) einer drahtlosen Vorrichtung (100), der aufweist:
    ein Gehäuse (410), das über dem Lautsprecher (134) angebracht ist und mit einer oberen Oberfläche (1100) des Lautsprechers (134) ein vorderes Volumen (900) für den vorderen Resonator (400) bildet; und
    eine horizontale oder annähernd horizontale Röhre (910), die an einer inneren Oberfläche (411) des Gehäuses (410) innerhalb des vorderen Volumens (900) ausgebildet oder angebracht ist, wobei die Röhre (910) mit dem vorderen Volumen (900) gekoppelt ist, und die Röhre (910) zumindest ein Ende (430, 440) hat, um Klang von der drahtlosen Vorrichtung (100) auszugeben, der von dem Lautsprecher (134) erzeugt wird und durch das vordere Volumen (900) und die Röhre (910) geht.
  2. Der vordere Resonator (400) gemäß Anspruch 1, wobei die Röhre (910) horizontal oder annähernd horizontal ist in Bezug auf eine vertikale Achse des vorderen Volumens (900).
  3. Der vordere Resonator (400) gemäß Anspruch 2, wobei die Röhre (910) durch eine Platte (420) gebildet wird, die eine obere Oberfläche (421) hat, die an der inneren Oberfläche (411) des Gehäuses (410) angebracht ist, wobei in der oberen Oberfläche (421) der Platte (420) eine Vertiefung (800) ausgebildet ist, wobei die Vertiefung (800) und die innere Oberfläche (411) des Gehäuses (410) die Röhre (910) bilden, wobei die Vertiefung (800) eine darin ausgebildete Öffnung (500) hat zum Koppeln des vorderen Volumens (900) mit der Röhre (910), wobei das Gehäuse (410) zumindest eine Öffnung (430, 440) hat, die darin ausgebildet ist und in der Nähe von zumindest einem jeweiligen Ende (530, 540) der Vertiefung (800) ausgerichtet ist, um Klang von der drahtlosen Vorrichtung (100) auszugeben, der von dem Lautsprecher (134) erzeugt wird und durch das vordere Volumen (900) und die Röhre (910) geht.
  4. Der vordere Resonator (400) gemäß Anspruch 3, wobei die Vertiefung (800) gerade ist.
  5. Der vordere Resonator (400) gemäß den Ansprüchen 3 oder 4, wobei die Öffnung (500) in der Vertiefung (800) in der Nähe eines Zentrums der Vertiefung (800) ausgebildet ist.
  6. Der vordere Resonator (400) gemäß einem der Ansprüche 3 bis 5, wobei die Öffnung (500) in der Vertiefung (800) in einem Boden der Vertiefung (800) gebildet ist.
  7. Der vordere Resonator (400) gemäß einem der Ansprüche 3 bis 6, wobei die Vertiefung (800) eine glatte Form mit abgerundeten Enden hat.
  8. Der vordere Resonator (400) gemäß Anspruch 7, wobei die zumindest eine Öffnung (430, 440) in dem Gehäuse (410) halbkreisförmige und rechteckige Teile hat, die mit zumindest einemjeweiligen Ende (530, 540) der Vertiefung (800) ausgerichtet sind.
  9. Der vordere Resonator (400) gemäß einem der Ansprüche 3 bis 8, wobei die Öffnung (500) in der Vertiefung (800) eine rechteckige Form hat.
  10. Der vordere Resonator (400) gemäß einem der Ansprüche 3 bis 9, wobei die obere Oberfläche der Platte (420), die innere Oberfläche (411) des Gehäuses (410), die Vertiefung (800), und eine Befestigungsebene des Lautsprechers (134) parallel oder annähernd parallel sind.
  11. Der vordere Resonator (400) gemäß einem der Ansprüche 1 bis 10, wobei ein Volumen des vorderen Volumens (900) und ein Volumen der Röhre (910) ausgewählt sind, eine Frequenzantwort von ungefähr 4 kHz vorzusehen.
  12. Der vordere Resonator (400) gemäß einem der Ansprüche 1 bis 11, wobei die Röhre (910) erste und zweite Abschnitte (531, 541) hat.
  13. Der vordere Resonator (400) gemäß Anspruch 12, wobei für eine Frequenzantwort von ungefähr 4 kHzjeder der ersten und zweiten Abschnitte (531, 541) ungefähr 0,4 mm hoch ist, 1,2 mm breit, 2,5 mm lang ist und das vordere Volumen (900) ungefähr 40 mm3 ist.
  14. Eine drahtlose Vorrichtung (100) mit einem vorderen Resonator (400) gemäß einem der Ansprüche 1 bis 13.
EP09168256.7A 2009-08-20 2009-08-20 Frontresonator für einen Lautsprecher einer drahtlosen Vorrichtung Active EP2288177B1 (de)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP09168256.7A EP2288177B1 (de) 2009-08-20 2009-08-20 Frontresonator für einen Lautsprecher einer drahtlosen Vorrichtung
EP13154777.0A EP2595409A3 (de) 2009-08-20 2009-08-20 Frontresonator für einen Lautsprecher einer drahtlosen Vorrichtung
CA2711351A CA2711351C (en) 2009-08-20 2010-07-26 A front resonator for a speaker of a wireless device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP09168256.7A EP2288177B1 (de) 2009-08-20 2009-08-20 Frontresonator für einen Lautsprecher einer drahtlosen Vorrichtung

Related Child Applications (1)

Application Number Title Priority Date Filing Date
EP13154777.0 Division-Into 2013-02-11

Publications (2)

Publication Number Publication Date
EP2288177A1 EP2288177A1 (de) 2011-02-23
EP2288177B1 true EP2288177B1 (de) 2013-07-31

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EP13154777.0A Ceased EP2595409A3 (de) 2009-08-20 2009-08-20 Frontresonator für einen Lautsprecher einer drahtlosen Vorrichtung
EP09168256.7A Active EP2288177B1 (de) 2009-08-20 2009-08-20 Frontresonator für einen Lautsprecher einer drahtlosen Vorrichtung

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EP13154777.0A Ceased EP2595409A3 (de) 2009-08-20 2009-08-20 Frontresonator für einen Lautsprecher einer drahtlosen Vorrichtung

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CA (1) CA2711351C (de)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1916869A2 (de) * 2006-10-25 2008-04-30 LG Electronics Inc. Lautsprecher in einem Gehäuse für eine mobile Kommunikationsvorrichtung

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Publication number Priority date Publication date Assignee Title
DK173789B1 (da) * 1998-10-05 2001-10-22 Kirk Acoustics As Elektroakustisk kommunikationsenhed
US6339649B1 (en) * 1999-04-12 2002-01-15 Waterson Chen Loudspeaker system with stackable loudspeaker units
US7068979B2 (en) * 2001-11-27 2006-06-27 Nokia Corporation Mobile telecommunications device
US7058366B2 (en) * 2002-12-09 2006-06-06 Sony Ericsson Mobile Communications Ab Wireless terminal providing sound pressure level dissipation through channeled porting of sound
US6785395B1 (en) * 2003-06-02 2004-08-31 Motorola, Inc. Speaker configuration for a portable electronic device
JP4230847B2 (ja) * 2003-07-11 2009-02-25 株式会社東芝 携帯端末装置
US7522741B2 (en) * 2003-11-25 2009-04-21 Nxp B.V. Electro-acoustic apparatus comprising an electro-acoustic transducer
JP2006279260A (ja) * 2005-03-28 2006-10-12 Nec Saitama Ltd 携帯端末
US8180075B2 (en) * 2007-04-26 2012-05-15 Motorola Mobility, Inc. Arrangement for variable bass reflex cavities

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1916869A2 (de) * 2006-10-25 2008-04-30 LG Electronics Inc. Lautsprecher in einem Gehäuse für eine mobile Kommunikationsvorrichtung

Also Published As

Publication number Publication date
EP2595409A2 (de) 2013-05-22
CA2711351A1 (en) 2011-02-20
CA2711351C (en) 2014-10-21
EP2595409A3 (de) 2013-08-07
EP2288177A1 (de) 2011-02-23

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