(19)
(11) EP 2 387 254 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
28.12.2011 Bulletin 2011/52

(43) Date of publication A2:
16.11.2011 Bulletin 2011/46

(21) Application number: 11176831.3

(22) Date of filing: 27.02.2009
(51) International Patent Classification (IPC): 
H04R 5/04(2006.01)
H04R 5/033(2006.01)
 H04R 29/00(2006.01)
H04R 1/10(2006.01)
(84) Designated Contracting States:
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK TR

(62) Application number of the earlier application in accordance with Art. 76 EPC:
09154033.6 / 2224749

(71) Applicant: RESEARCH IN MOTION LIMITED
Waterloo, Ontario N2L 3W8 (CA)

(72) Inventor:
  • Martin, Cyril
    44799 Bochum (DE)

(74) Representative: Moore, Barry et al
Hanna Moore & Curley 13 Lower Lad Lane
Dublin 2
Dublin 2 (IE)

   


(54) Method and system for controlling a maximum signal level output to headphones coupled to a wireless device


(57) A method for controlling a maximum signal level output to headphones of a wireless device is provided. The method includes: determining an impedance of the headphones; determining a carrier specific maximum signal level for headphones having the impedance; and, adjusting an audio amplifier of the wireless device coupled to the headphones to restrict the maximum signal level output to the headphones to the carrier specific maximum signal level.







Search report