EP2224749B1 - Verfahren und System zum Steuern einer maximalen Signalstufenausgabe and Kopfhörer, die mit einer Funkvorrichtung gekoppelt sind - Google Patents

Verfahren und System zum Steuern einer maximalen Signalstufenausgabe and Kopfhörer, die mit einer Funkvorrichtung gekoppelt sind Download PDF

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Publication number
EP2224749B1
EP2224749B1 EP09154033A EP09154033A EP2224749B1 EP 2224749 B1 EP2224749 B1 EP 2224749B1 EP 09154033 A EP09154033 A EP 09154033A EP 09154033 A EP09154033 A EP 09154033A EP 2224749 B1 EP2224749 B1 EP 2224749B1
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EP
European Patent Office
Prior art keywords
headphones
wireless device
maximum signal
signal level
impedance
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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
EP09154033A
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English (en)
French (fr)
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EP2224749A1 (de
Inventor
Cyril Martin
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BlackBerry Ltd
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Research in Motion Ltd
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Filing date
Publication date
Application filed by Research in Motion Ltd filed Critical Research in Motion Ltd
Priority to EP09154033A priority Critical patent/EP2224749B1/de
Priority to EP11195765.0A priority patent/EP2453672B1/de
Priority to EP11176831.3A priority patent/EP2387254B1/de
Priority to AT09154033T priority patent/ATE531208T1/de
Priority to CA2691308A priority patent/CA2691308C/en
Priority to CN201010125928.4A priority patent/CN101820697B/zh
Publication of EP2224749A1 publication Critical patent/EP2224749A1/de
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Publication of EP2224749B1 publication Critical patent/EP2224749B1/de
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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R5/00—Stereophonic arrangements
    • H04R5/04—Circuit arrangements, e.g. for selective connection of amplifier inputs/outputs to loudspeakers, for loudspeaker detection, or for adaptation of settings to personal preferences or hearing impairments
    • 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
    • H04R1/10—Earpieces; Attachments therefor ; Earphones; Monophonic headphones
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2430/00—Signal processing covered by H04R, not provided for in its groups
    • H04R2430/01—Aspects of volume control, not necessarily automatic, in sound systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2460/00—Details of hearing devices, i.e. of ear- or headphones covered by H04R1/10 or H04R5/033 but not provided for in any of their subgroups, or of hearing aids covered by H04R25/00 but not provided for in any of its subgroups
    • H04R2460/07—Use of position data from wide-area or local-area positioning systems in hearing devices, e.g. program or information selection
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R29/00—Monitoring arrangements; Testing arrangements
    • H04R29/001—Monitoring arrangements; Testing arrangements 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
    • H04R5/00—Stereophonic arrangements
    • H04R5/033—Headphones for stereophonic communication

Definitions

  • This application relates to the field of wireless devices, and more specifically, to a method and system for controlling a maximum signal level output to headphones coupled to a wireless device.
  • Wireless mobile communication devices include microprocessors, memory, soundcards, speakers, headphones, and run one or more software applications in addition to providing for voice communications. Examples of software applications used in these wireless devices include micro-browsers, address books, email clients, instant messaging (“IM”) clients, and wavetable instruments. Additionally, wireless devices have access to a plurality of services via the Internet. A wireless device may, for example, be used to browse web sites on the Internet, to transmit and receive graphics, and to execute streaming audio and/or video applications. Such wireless devices may operate on a cellular network, on a wireless local area network (“WLAN”), or on both of these types of networks.
  • WLAN wireless local area network
  • One problem with current wireless devices pertains to the adjustment of maximum output sound pressure levels for headphones coupled to such devices. Headphones are typically used to listen to voice calls, radio programs, audio programs (e.g., music), etc., stored on or accessed by the wireless device.
  • the maximum output sound pressure level for headphones for wireless devices and handheld products is legally constrained in several jurisdictions in order to protect users from hearing loss.
  • One problem relating to such standards is that in order to set the output signal level (e.g., in mV RMS) appropriately at the output jack of the wireless device in order to meet the maximum sound pressure level specified, the impedance of the headphones must be known. This is especially problematic if the headphones are not provided by the manufacturer as a package with the wireless device.
  • the output signal level e.g., in mV RMS
  • German Patent Specification No. DE 10 2007 032281 discloses a system which includes a sound transducer, an output terminal, an amplifying means and a controls means.
  • the control means is operable to adjust a gain of the amplifying means in response to a sound level.
  • WO 2008/128563 discloses a hearing system which comprises a storage unit.
  • the storage unit comprises location-related data relating to the hearing system's current location.
  • the function of the hearing system changes in dependence of the location of the hearing system
  • European Patent Specification No. EP 1 720 375 relates to a system for enabling a hearing device wireless access to a communication network.
  • the system comprises a first transceiver unit communicating according to a first communication protocol.
  • the system further comprises a server device comprising an input/output unit, which is connected to the communication network and communicates according to a second communication protocol.
  • a first embodiment of the invention provides a method as detailed in claim 1.
  • the invention also provides a system as detailed in claim 9. Additionally, the invention relates to a computer readable medium as detailed in claim 11. Advantageous embodiments are provided in the dependent claims.
  • FIG. 1 is a front view illustrating a wireless device coupled to headphones and adapted for implementing an embodiment of the application
  • FIG. 2 is a block diagram illustrating the wireless device of FIG. 1 and a wireless network adapted for implementing an embodiment of the application;
  • FIG. 3 is a block diagram illustrating a memory of the wireless device of FIGS. 1 and 2 ;
  • FIG. 4 is a block diagram illustrating a headphones subsystem
  • FIG. 5 is a block diagram illustrating an alternate headphones subsystem
  • FIG. 6 is a flow chart illustrating operations of modules within the memory of a wireless device for controlling maximum signal level output to headphones of the wireless device, in accordance with an embodiment of the application.
  • Embodiments of the present application may be implemented in any computer programming language provided that the operating system of the wireless device or data processing system provides the facilities that may support the requirements of the application. Any limitations presented would be a result of a particular type of operating system or computer programming language and would not be a limitation of the present application.
  • Embodiments of the preset application may also be implemented in hardware or in a combination of hardware and software.
  • FIG. 1 is a front view illustrating a wireless device 100 coupled to headphones 105 (a.k.a., headphone set, headphone, headset, earphone, earphones, etc.) and adapted for implementing an embodiment of the application.
  • the wireless device 100 includes a casing 150, a display screen 122, a graphical user interface ("GUI") 180 displayed on the display screen 122, a keyboard (or keypad) 132, a trackball (or thumbwheel) 110, various select buttons 120, various inputs/outputs (e.g., power connector jack, data interface ports, etc.) 160, and a headphones jack 106.
  • GUI graphical user interface
  • the wireless device 100 includes one or more circuit boards (not shown), a CPU 138, memory 124, 126, 200, a battery 156, an antenna (not shown), etc., which are operatively coupled to the various inputs/outputs 160, the keyboard 132, the display screen 122, the headphones jack 106, etc., as will be described below.
  • the headphones 105 are coupled to the wireless device 100 by a headphones cable or lead 107 which is inserted into the headphones jack 106.
  • the headphones 105 include a speaker assembly which is inserted into or placed over a user's ear.
  • the headphones 105 include two speaker assemblies, one for each of the user's ears.
  • Each speaker assembly includes a speaker having an impedance (referred to as the impedance of the headphones in the following).
  • the headphones 105, headphones jack 106, and headphones cable 107 may be configured for stereo and/or mono operation. When the headphones cable 107 is inserted into the headphones jack 106, audio output signals may be switched from the internal speaker 134 (see FIG. 2 ) to the headphones 105.
  • the headphones jack 106 is a 3.5 mm headset jack adapted to support both a stereo headphones output and a mono microphone input.
  • FIG. 2 is a block diagram illustrating the wireless device 100 of FIG. 1 and a wireless network 220 adapted for implementing an embodiment of the application.
  • 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 wireless device 100 has a communication subsystem 111, which includes a RF receiver, a RF transmitter, and associated components. As will be apparent to those skilled in the field of communications, the particular design of the communication subsystem 111 depends on the communication network 220 in which the device 100 is intended to operate.
  • the device 100 may be capable of cellular network access and hence the device 100 may have a subscriber identity module (or "SIM” card) 162 for inserting into a SIM interface (“IF") 164 in order to operate on the cellular network (e.g., a global system for mobile communication (“GSM”) network).
  • SIM subscriber identity module
  • IF SIM interface
  • GSM global system for mobile communication
  • the device 100 may be a battery-powered device and so it may also include a battery IF 154 for receiving one or more rechargeable batteries 156.
  • the battery (or batteries) 156 provides electrical power to most if not all electrical circuitry in the device 100, and the battery IF 154 provides for a mechanical and electrical connection for it.
  • the wireless device 100 includes a microprocessor 138, also called a processor, which controls overall operation of the device 100 .
  • the microprocessor 138 interacts with device subsystems such as the display 122, 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, the keyboard 132, the trackball or thumbwheel 110, the headphones 105, an internal speaker 134, a microphone 136, a short-range communications subsystem 141, and other device subsystems 142.
  • the microprocessor 138 in addition to performing operating system functions, preferably enables execution of software applications on the device 100.
  • FIG. 3 is a block diagram illustrating a memory 200 of the wireless device 100 of FIGS. 1 and 2 .
  • 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 (“O/S”) software modules 202 used by the microprocessor 138 may be stored in a persistent store such as the flash memory 124, which may alternatively be a read-only memory (“ROM”) or similar storage element (not shown).
  • ROM read-only memory
  • Those skilled in the art will appreciate that the operating system, specific device applications, or parts thereof, may be temporarily loaded into a volatile store such as RAM 126.
  • operating system software modules 202 resident on the device 100 provide a basic set of operations for supporting various applications typically operable through the GUI 180 and supporting GUI software modules 204.
  • the O/S 202 provides basic input/output system features to obtain input from the auxiliary I/O 128, the keyboard 132, the trackball or thumbwheel 110, and the like, and for facilitating output to the user through the display 122, the speaker 134, the headphones 105, etc.
  • the wireless device 100 is provided with hardware and/or software modules 206 for facilitating and implementing the method of the application as will be described below.
  • GUIs are supported by common operating systems and provide a display format which enables a user to choose commands, execute application programs, manage computer files, and perform other functions by selecting pictorial representations known as icons, or items from a menu through use of an input or pointing device such as a trackball or thumbwheel 110 and keyboard 132.
  • the GUI 180 may include a cursor 190, various selectable objects and icons 191, and various windows 192.
  • the wireless device 100 includes computer executable programmed instructions for directing the device 100 for the implementation of the present application.
  • the programmed instructions may be embodied in one or more hardware or software modules 206 which may be resident in the memory 200 of the wireless device 100.
  • the programmed instructions may be embodied on a computer readable medium (such as a CD disk or floppy disk) which may be used for transporting the programmed instructions to the memory of the wireless device 100.
  • the programmed instructions may be embedded in a computer-readable signal or signal-bearing medium that may be uploaded to a network 220 by a vendor or supplier of the programmed instructions, and this signal or signal-bearing medium may be downloaded through an interface 111, 131, 141 to the wireless device 100 from the network 220 by end users or potential buyers.
  • FIG. 4 is a block diagram illustrating a headphones subsystem 400.
  • Components of the headphones subsystem 400 are generally contained in the wireless device 100 and are used to determine the impedance of the headphones 105 in order to adjust the maximum signal level (e.g., in mV RMS) output to the headphones 105 (and hence the maximum sound pressure level output by the headphones 105).
  • the maximum signal level e.g., in mV RMS
  • the headphones system 400 includes a signal generator 410, a digital to analog converter (“DAC") 440, and an audio amplifier 430 for generating an inaudible high frequency signal (e.g., 25 kHz).
  • the signal generator 410, DAC 440, and audio amplifier 430 are controlled by the microprocessor 138.
  • the audio amplifier 430 is coupled to the headphones 105 through a series resistor R.
  • the series resistor R may have a low value (e.g., 5 Ohms).
  • a voltage V produced across the resistor R when the high frequency signal is applied to the resistor R and headphones 105 is indicative of the impedance Z of the headphones 105.
  • the signal may be applied to the resistor R and headphones 105 whenever the headphones 105 are connected to the headphones jack 106 via the headphones cable 107.
  • the voltage V is amplified by a microphone pre-amplifier 450 which is coupled to an analog to digital converter ("ADC") 420.
  • the ADC 420 monitors the voltage V and provides a digital signal indicative of the voltage V and hence the impedance Z of the headphones 105 to the microprocessor 138.
  • the ADC 420 may also be used by the microphone 136 of the wireless device 100 in order to reduce component count.
  • the microprocessor 138 receives the digital signal from the ADC 420 and determines the impedance Z of the headphones 105 from it (e.g., by voltage divider principles, etc.).
  • the microprocessor 138 may do this by accessing a table that stores voltage values (or digital signal values) and corresponding headphones impedance values.
  • the microprocessor 138 controls the audio amplifier 430 to restrict the maximum signal level (e.g., in mV RMS) output to the headphones 105. In this way, the sound pressure level output by the headphones 105 may be restricted to a maximum sound pressure level for the determined impedance Z .
  • the microprocessor 138 may do this by accessing a table (e.g., included in or associated with modules 206) that stores headphones impedance values, corresponding maximum signal level values for the audio amplifier 430, and/or corresponding maximum sound pressure values for the headphones 105. For example, for a headphones impedance value of approximately 32 Ohms, the table 406 may indicate that the maximum sound pressure level for the headphones 105 is 100 dB.
  • a headphone impedance value corresponding to the determined headphone impedance Z is not listed in the table 406, no maximum signal level for the audio amplifier 430 and no maximum sound pressure level for the headphones 105 is prescribed and hence the maximum signal level of the audio amplifier 430 and the maximum sound pressure level for the headphones 105 are not restricted for that value of determined headphones impedance Z.
  • the maximum signal level (e.g., in mV RMS) and/or the maximum sound pressure level (e.g., in dB) for a given headphones impedance may be set by government regulation which may change depending on the carrier or the location in which the wireless device 100 is operating or is sold.
  • the wireless device 100 has means for determining its carrier and/or location and hence the government regulations that may apply to set maximum signal levels and/or maximum sound pressure levels.
  • the microprocessor 138 receives a signal indicative of the carrier and/or location of the wireless device 100 and determines whether a maximum signal level value and/or a maximum sound pressure level value has been prescribed for the carrier and/or location and for the determined headphones impedance Z.
  • the microprocessor 138 may do this by accessing a table 406 that stores wireless device location, corresponding headphones impedance values, corresponding carrier (or location) specific maximum signal level values (if any) for the audio amplifier 430, and/or corresponding carrier (or location) specific maximum sound pressure level values (if any) for the headphones 105.
  • the table may indicate that if the wireless device 100 is associated with a carrier based in Great Britain and if the headphones impedance is 32 Ohms (i.e., +/- 20%), then the maximum sound pressure level should be restricted to 100 dB (i.e., if the headphones 105 and wireless device 100 are sold as a package).
  • the table 406 may indicate that if the wireless device 100 is associated with a carrier based in Great Britain and if the headphones impedance is 32 Ohms (i.e., +/- 20%), then the maximum sound pressure level should be restricted to 94 dB (i.e., if the headphones 105 and wireless device 100 are not sold as a package).
  • the maximum signal level (e.g., in mV RMS) and/or the maximum sound pressure level (e.g., in dB) may be set by government regulation which may change depending on the carrier or the location in which the wireless device 100 is operating or is sold (i.e., irrespective of the impendence of the headphones 105).
  • the wireless device 100 has means for determining its carrier and/or location and hence the government regulations that may apply to set maximum signal levels and/or maximum sound pressure levels.
  • the microprocessor 138 receives a signal indicative of the carrier and/or location of the wireless device 100 and determines whether a maximum signal level value and/or a maximum sound pressure level value has been prescribed for the carrier and/or location.
  • the microprocessor 138 may do this by accessing a table 406 that stores wireless device carrier (or location), corresponding headphones impedance values, corresponding carrier specific maximum signal level values (if any) for the audio amplifier 430, and/or corresponding carrier specific maximum sound pressure level values (if any) for the headphones 105.
  • the table 406 may indicate that if the wireless device 100 is associated with a carrier based in Great Britain, then the maximum sound pressure level should be restricted to 100 dB (i.e., if the headphones 105 and wireless device 100 are sold as a package).
  • the table 406 may indicate that if the wireless device 100 is associated with a carrier based in Great Britain, then the maximum sound pressure level should be restricted to 94 dB (i.e., if the headphones 105 and wireless device 100 are not sold as a package).
  • Updates to the table 406 storing carrier (or wireless device location), corresponding headphones impedance values, corresponding carrier specific maximum signal level values (if any) for the audio amplifier 430, and corresponding carrier specific maximum sound pressure level values (if any) for the headphones 105 may be periodically downloaded to the wireless device 100 (e.g., over the network 220).
  • the carrier associated with the wireless device 100 may be determined from messages delivered to the wireless device 100 over the network 220. According to another embodiment, the carrier may be determined from information stored in the wireless device's SIM card 162.
  • the location of the wireless device 100 may be determined from messages delivered to the wireless device 100 over the network 220. According to another embodiment, the location of the wireless device 100 may be determined by a global positioning system (“GPS") receiver (not shown) optionally provided for the device 100. The location of the wireless device 100 may be determined from the location of antennae towers associated with the network 220 on which the wireless device 100 operates.
  • GPS global positioning system
  • FIG. 5 is a block diagram illustrating an alternate headphones subsystem 400 .
  • a signal source 510 e.g., microprocessor 138
  • DAC digital to analog converter
  • the output of the DAC 540 is conditioned 530 (e.g., amplified 430, etc.) to allow for impendence measurement 520 (e.g., via a resistor R , etc.) of the headphones 105 connected to the headphones jack 506 .
  • the application may provide several advantages.
  • the method of the present application allows wireless devices 100 to restrict maximum signal levels and maximum sound pressure levels to prescribed legal limits when necessary.
  • FIG. 6 is a flow chart illustrating operations 600 of modules 206 within the memory 200 of a wireless device 210 for controlling maximum signal level output to headphones 105 of the wireless device 100, in accordance with an embodiment of the application.
  • an impedance Z of the headphones 105 is determined.
  • a carrier specific maximum signal level for headphones having the impedance Z is determined.
  • an audio amplifier 430 of the wireless device 100 coupled to the headphones 105 is adjusted to restrict the maximum signal level output to the headphones 105 to the carrier specific maximum signal level.
  • the above described method is generally performed by the wireless device 100.
  • the method can be performed by, or in combination with, a data processing system (not shown) such a personal computer ("PC") or server, a stereo system, a television system, etc.
  • a data processing system such as a personal computer (“PC") or server, a stereo system, a television system, etc.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Circuit For Audible Band Transducer (AREA)
  • Headphones And Earphones (AREA)
  • Amplifiers (AREA)
  • Transceivers (AREA)
  • Telephone Function (AREA)

Claims (11)

  1. Verfahren zum Steuern einer maximalen Signalpegelausgabe an Kopfhörer (105) einer drahtlosen Vorrichtung (100), das aufweist:
    Bestimmen einer Impedanz der Kopfhörer (105); dadurch gekennzeichnet,
    dass das Verfahren weiter umfasst:
    Bestimmen eines Carrier-spezifischen maximalen Signalpegels für Kopfhörer (105) mit der Impedanz, wobei der Carrier-spezifische maximale Signalpegel ein maximaler Signalpegel ist, der vorgeschrieben ist für einen zellularen Netzwerk-Carrier, in dem die drahtlose Vorrichtung arbeitet, und für Kopfhörer (105) mit der Impedanz; und
    Anpassen eines Audioverstärkers (430) der drahtlosen Vorrichtung (100),
    der mit den Kopfhörern (105) verbunden ist, um die maximale Signalpegelausgabe an die Kopfhörer (105) auf den Carrier-spezifischen maximalen Signalpegel zu begrenzen, und wobei das Bestimmen des Carrier-spezifischen maximalen Signalpegels aufweist ein Durchsuchen einer Tabelle, die in der drahtlosen Vorrichtung (100) gespeichert ist, unter Verwendung der Impedanz und des Carriers, wobei die Tabelle Impedanzen, Carrier und entsprechende Carrier-spezifische maximale Signalpegel auflistet.
  2. Verfahren gemäß Anspruch 1, wobei das Bestimmen der Impedanz weiter aufweist ein Anlegen eines Audiosignals an die Kopfhörer (105).
  3. Verfahren gemäß Anspruch 2, wobei das Audiosignal ein nicht-hörbares Audiosignal ist.
  4. Verfahren gemäß Anspruch 3, wobei der Carrier aus einem Signal bestimmt wird, das von einem Netzwerk (220) empfangen wird, in dem die drahtlose Vorrichtung (100) arbeitet.
  5. Verfahren gemäß einem der Ansprüche 1 bis 4, wobei der Carrier zu einem Ort gehört, und weiter aufweist ein Bestimmen des Orts.
  6. Verfahren gemäß Anspruch 5, wobei das Bestimmen des Carrier-spezifischen maximalen Signalpegels weiter aufweist ein Durchsuchen einer Tabelle, die in der drahtlosen Vorrichtung (100) gespeichert ist, unter Verwendung der Impedanz und des Ortes, wobei die Tabelle Impedanzen, Orte und entsprechende Carrier-spezifische maximale Signalpegel auflistet.
  7. Verfahren gemäß Anspruch 5 oder Anspruch 6, wobei der Ort aus einem Signal bestimmt wird, das von einem Netzwerk (220) empfangen wird, in dem die mobile Vorrichtung (100) arbeitet.
  8. Verfahren gemäß einem der Ansprüche 1 bis 7, wobei das Anpassen des Audioverstärkers (430) durchgeführt wird, wenn der Carrier-spezifische maximale Signalpegel für die Impedanz bestimmt werden kann.
  9. System für eine drahtlose Vorrichtung (100) zum Steuern einer maximalen Signalpegelausgabe an Kopfhörer (105), die mit der drahtlosen Vorrichtung (100) verbunden sind, das aufweist:
    einen Speicher (200) zum Speichern von Programmanweisungen; und
    einen Prozessor (138), der mit dem Speicher (200) verbunden ist und
    konfiguriert ist zum Ausführen der Programmanweisungen, um das System zu veranlassen, die Schritte des Verfahrens gemäß einem der Ansprüche 1 bis 9 zu implementieren.
  10. Drahtlose Vorrichtung (100) mit einem System gemäß Anspruch 9.
  11. Computerlesbares Medium, das Programmanweisungen enthält, die durch einen Prozessor einer drahtlosen Vorrichtung (100) ausführbar sind, um die drahtlose Vorrichtung (100) zu veranlassen, die Schritte des Verfahrens gemäß einem der Ansprüche 1 bis 8 zu implementieren.
EP09154033A 2009-02-27 2009-02-27 Verfahren und System zum Steuern einer maximalen Signalstufenausgabe and Kopfhörer, die mit einer Funkvorrichtung gekoppelt sind Active EP2224749B1 (de)

Priority Applications (6)

Application Number Priority Date Filing Date Title
EP09154033A EP2224749B1 (de) 2009-02-27 2009-02-27 Verfahren und System zum Steuern einer maximalen Signalstufenausgabe and Kopfhörer, die mit einer Funkvorrichtung gekoppelt sind
EP11195765.0A EP2453672B1 (de) 2009-02-27 2009-02-27 Verfahren und System zur Steuerung eines maximalen Signalpegelausgangs für an eine drahtlose Vorrichtung gekoppelte Kopfhörern
EP11176831.3A EP2387254B1 (de) 2009-02-27 2009-02-27 Verfahren und System zur Steuerung eines maximalen Signalpegelausgangs zu an eine drahtlose Vorrichtung gekoppelte Kopfhörern
AT09154033T ATE531208T1 (de) 2009-02-27 2009-02-27 Verfahren und system zum steuern einer maximalen signalstufenausgabe and kopfhörer, die mit einer funkvorrichtung gekoppelt sind
CA2691308A CA2691308C (en) 2009-02-27 2010-01-28 Method and system for controlling a maximum signal level output to headphones coupled to a wireless device
CN201010125928.4A CN101820697B (zh) 2009-02-27 2010-02-25 控制对无线设备的耳机的最大信号电平输出的方法和系统

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP09154033A EP2224749B1 (de) 2009-02-27 2009-02-27 Verfahren und System zum Steuern einer maximalen Signalstufenausgabe and Kopfhörer, die mit einer Funkvorrichtung gekoppelt sind

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EP09154033A Active EP2224749B1 (de) 2009-02-27 2009-02-27 Verfahren und System zum Steuern einer maximalen Signalstufenausgabe and Kopfhörer, die mit einer Funkvorrichtung gekoppelt sind
EP11195765.0A Active EP2453672B1 (de) 2009-02-27 2009-02-27 Verfahren und System zur Steuerung eines maximalen Signalpegelausgangs für an eine drahtlose Vorrichtung gekoppelte Kopfhörern

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CN (1) CN101820697B (de)
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US9124980B2 (en) * 2012-07-09 2015-09-01 Maxim Integrated Products, Inc. System and method for optimized playback of audio signals through headphones
EP2763433B1 (de) * 2013-02-01 2017-04-05 BlackBerry Limited Vorrichtung, Systeme und Verfahren zur unhörbaren Identifizierung eines Audiozubehörs unter Verwendung von Spektralformung
US9143863B2 (en) 2013-02-01 2015-09-22 Blackberry Limited Apparatus, systems and methods for inaudibly identifying an audio accessory using spectral shaping
CN104244141A (zh) * 2013-06-21 2014-12-24 深圳富泰宏精密工业有限公司 耳机音频输出控制电路
CN105700613B (zh) * 2016-02-14 2017-12-12 惠州Tcl移动通信有限公司 一种移动终端的输出功率调整装置及其方法
US9872117B2 (en) 2016-03-01 2018-01-16 Blackberry Limited Device and method for adjusting an output to an audio port based on a determined sensitivity
CN105827505A (zh) * 2016-03-10 2016-08-03 广东欧珀移动通信有限公司 一种即时通讯的通知方法、装置及移动终端

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Publication number Publication date
EP2453672A1 (de) 2012-05-16
CA2691308A1 (en) 2010-08-27
CA2691308C (en) 2014-04-01
ATE531208T1 (de) 2011-11-15
EP2224749A1 (de) 2010-09-01
EP2387254A2 (de) 2011-11-16
EP2453672B1 (de) 2013-05-01
EP2387254B1 (de) 2015-11-11
CN101820697A (zh) 2010-09-01
EP2387254A3 (de) 2011-12-28
CN101820697B (zh) 2014-12-17

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