Acoustic dipole radiator for portable electronic devices

(19)

(11)

EP 1 113 702 A3

(12)	EUROPEAN PATENT APPLICATION

(88)	Date of publication A3:
	18.12.2002 Bulletin 2002/51

(43)	Date of publication A2:
	04.07.2001 Bulletin 2001/27

(21)	Application number: 00310555.8

(22)	Date of filing: 29.11.2000

(51)	International Patent Classification (IPC)⁷: H04R 1/40, H04R 5/02

(84)	Designated Contracting States:
	AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR
	Designated Extension States:
	AL LT LV MK RO SI

(30)

Priority:

31.12.1999 US 476045

(71)	Applicant: Nokia Corporation
	02150 Espoo (FI)

(72)	Inventors:
	Niemitalo, Paavo DSF90820 Kello (FI) Laukkann, Marko 90550 Oulu (FI) Rautiainen, Juha 90550 Oulu (FI) Mikkonen, Riku 90100 Oulu (FI)

(74)	Representative: Read, Matthew Charles et al
	Venner Shipley & Co. 20 Little Britain London EC1A 7DH London EC1A 7DH (GB)

(54)	Acoustic dipole radiator for portable electronic devices

(57) A wearable acoustic dipole radiator accessory for portable electronic devices such as mobile phones, portable cassette players, MP3 players, portable radios, or any other suitable device. The acoustic dipole radiator has two loudspeakers that are acoustically connected by an interconnection cavity. The loudspeakers do not need to contact the user's ears. The interconnection cavity limits mutual interference between the front and backwaves of the loudspeakers. In one embodiment, the acoustic dipole radiator is implemented in a necklace. In another embodiment, the acoustic dipole radiator is implemented in a helmet. In yet another embodiment, the acoustic dipole radiator is implemented in a headset in which the loudspeakers do not contact the ears.

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