EP 3393138 A1 20181024 - AN AUTOMATIC MUTE SYSTEM AND A METHOD THEREOF FOR HEADPHONE
Title (en)
AN AUTOMATIC MUTE SYSTEM AND A METHOD THEREOF FOR HEADPHONE
Title (de)
AUTOMATISCHES STUMMSCHALTUNGSSYSTEM UND VERFAHREN FÜR KOPFHÖRER
Title (fr)
SYSTÈME DE SILENCIEUX AUTOMATIQUE ET PROCÉDÉ ASSOCIÉ POUR CASQUE D'ÉCOUTE
Publication
Application
Priority
EP 17167106 A 20170419
Abstract (en)
The present invention refers to an automatic mute system for earphone. The automatic mute system comprises an audio source (1), an amplifier unit (2), a buffer unit (3), at least one earpiece (5) and a comparator (4). The system can detect the availability of backward harmonics (10) due to reflected signal from the ear canal and mute the audio source (1) if they are not available. The amplifier unit (2) is provided for amplifying the audio signal from the audio source (1). The buffer unit (3) is provided in between the amplifier and the earpiece (5) for generating buffered audio signal. The backward harmonics (10) are generated from reflected audio signals from the ear canal and obtained by the earpiece (5). The comparator (4) is provided for detecting backward harmonics (10) by means of input and output buffered audio signal. The comparator (4) can generate a mute signal (7) for turning off the amplifier unit (2) when the backward harmonics (10) is not present.
IPC 8 full level
H04R 1/10 (2006.01); H04R 25/00 (2006.01)
CPC (source: EP)
H04R 3/00 (2013.01); H04R 1/1041 (2013.01); H04R 25/305 (2013.01); H04R 2400/01 (2013.01); H04R 2430/01 (2013.01); H04R 2460/03 (2013.01)
Citation (applicant)
- KR 20070025167 A 20070308 - LG ELECTRONICS INC [KR]
- US 2013345842 A1 20131226 - KARAKAYA ELIF [US], et al
- WO 2015051819 A1 20150416 - GN NETCOM AS [DK]
- WHITE, J. AUDIO: "Considerations in high-fidelity moving-coil earphone design", IEEE TRANSACTIONS ON, vol. 11, no. 6, November 1963 (1963-11-01), pages 188 - 194, XP055405179, DOI: doi:10.1109/TAU.1963.1161732
Citation (search report)
- [XI] US 2015063587 A1 20150305 - PARK YONGHAHK [KR], et al
- [A] US 2004196992 A1 20041007 - RYAN JIM G [CA]
- [A] US 2007297634 A1 20071227 - HANSSON MAGNUS [SE]
- [A] US 2012207319 A1 20120816 - TSUCHIYA SHINPEI [JP], et al
- [A] US 2016081018 A1 20160317 - MACOURS CHRISTOPHE [BE]
- [A] JP 2004072498 A 20040304 - MATSUSHITA ELECTRIC IND CO LTD
Designated contracting state (EPC)
AL 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 RS SE SI SK SM TR
Designated extension state (EPC)
BA ME
DOCDB simple family (publication)
DOCDB simple family (application)
EP 17167106 A 20170419