CH694653A5 - Digitales Hörhilfegerät - Google Patents
Digitales Hörhilfegerät Download PDFInfo
- Publication number
- CH694653A5 CH694653A5 CH01581/00A CH15812000A CH694653A5 CH 694653 A5 CH694653 A5 CH 694653A5 CH 01581/00 A CH01581/00 A CH 01581/00A CH 15812000 A CH15812000 A CH 15812000A CH 694653 A5 CH694653 A5 CH 694653A5
- Authority
- CH
- Switzerland
- Prior art keywords
- hearing aid
- digital
- input signal
- clock frequency
- sampling rate
- Prior art date
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Classifications
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
- G06F1/26—Power supply means, e.g. regulation thereof
- G06F1/32—Means for saving power
- G06F1/3203—Power management, i.e. event-based initiation of a power-saving mode
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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
- H04R25/00—Deaf-aid sets, i.e. electro-acoustic or electro-mechanical hearing aids; Electric tinnitus maskers providing an auditory perception
- H04R25/50—Customised settings for obtaining desired overall acoustical characteristics
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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
- H04R2225/00—Details of deaf aids covered by H04R25/00, not provided for in any of its subgroups
- H04R2225/33—Aspects relating to adaptation of the battery voltage, e.g. its regulation, increase or decrease
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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
- 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
- H04R2460/03—Aspects of the reduction of energy consumption in hearing devices
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D10/00—Energy efficient computing, e.g. low power processors, power management or thermal management
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- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Neurosurgery (AREA)
- Otolaryngology (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Analogue/Digital Conversion (AREA)
- Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
- Amplifiers (AREA)
- Power Sources (AREA)
Description
Die Erfindung betrifft ein Hörhilfegerät mit wenigstens einer Spannungsquelle, einem Eingangswandler zur Aufnahme eines akustischen Eingangssignals, einem Ausgangswandler und einer Signalverarbeitungseinheit.
Im Allgemeinen weist ein digitales Hörhilfegerät wenigstens eine Spannungsquelle, beispielsweise eine Batterie oder einen Akkumulator, einen Signaleingang zur Aufnahme eines akustischen Eingangssignals und eine Signalverarbeitungseinheit auf. Vor der digitalen Verarbeitung eines analogen Eingangssignals wird dieses zunächst abgetastet und A/D-gewandelt. Die Abtastrate wird hier üblicherweise nach der höchsten noch auszuwertenden Frequenz des Eingangssignals (z.B. 10 kHz) gewählt. Ebenso werden die Taktfrequenzen der digitalen Bauelemente, wie z.B. A/D-Wandler, D/A-Wandler, Signalverarbeitungsprozessoren usw., bei der Herstellung des Hörhilfegeräts festgelegt. Diese bleiben fortan beim Betrieb des Hörhilfegeräts unverändert.
Aus RALLY Michael S., Stromspar-Tricks bei -Embedded Controllern, DESIGN & ELEKTRONIK DSPs und MIKROCONTROLLER; Oktober 98, sind Stromspar-Tricks bei Embedded Controllern bekannt. Dem Anwender dieses Controllers wird die Möglichkeit gegeben, die Taktfrequenz des Prozessorkerns herabzusetzen, wenn keine Verarbeitungsaufgaben vorliegen oder die Auslastung gering ist.
Aus BIERL Lutz, Sparsamer gehts kaum, Elektronik 26/1995, Seiten 67-71, ist ein Messsystem mit einem Mikrocomputer bekannt, bei dem nicht alle Komponenten ständig in Betrieb sind, sondern teilweise nur bei Bedarf eingeschaltet werden. Das System wird in bestimmten Zeitabständen zur Durchführung von Messungen und Berechnungen aufgeweckt und befindet sich sonst in einem Modus mit reduziertem Stromverbrauch.
Aus COLANDREA Francesco und Andere, KFZ-Chip mit allem drauf, Elektronik 23/1997, Seiten 60-62, 64, 66-68, 81, 82, ist ein digitaler Chip bekannt, der in einem Stand-by-Zustand mit verminderter Taktfrequenz getaktet wird.
Aufgabe der vorliegenden Erfindung ist es, den Ener-giebedarf eines digitalen Hörhilfegeräts zu senken.
Diese Aufgabe wird für ein digitales Hörhilfegerät mit wenigstens einer Spannungsquelle, einem Eingangswandler zur Aufnahme eines akustischen Eingangssignals, einem Ausgangswandler und einer Signalverarbeitungseinheit dadurch gelöst, dass die Abtastrate für das Eingangssignal und/oder die Taktfrequenz wenigstens eines digitalen Bauelements automatisch oder manuell veränderbar sind.
Bei den bekannten digitalen Hörhilfegeräten, die mit festgelegtem Systemtakt bzw. festgelegter Abtast-rate betrieben werden, ist der Energiebedarf für die Abtastung des akustischen Eingangssignals und den Betrieb der digitalen Bauelemente nahezu konstant. Häufig ist jedoch nicht die gesamte Bandbreite des Eingangssignals von Interesse und auch die maximal mögliche Prozessorleistung wird nur zum Teil ausgeschöpft. Der Energiebedarf zum Betrieb des Hörhilfegeräts bleibt davon jedoch unberührt.
Das erfindungsgemässe Herabsetzen der Ab-tastrate für das Eingangssignal und/oder der Taktfrequenz eines digitalen Bauelements, z.B. eines Mikroprozessors oder eines digitalen Signalprozessors, haben eine nahezu proportionale Verringerung der Leistungsaufnahme der entsprechenden Bauelemente zur Folge. In entsprechendem Masse lässt sich die Betriebszeit des Hörhilfegeräts mit einer eingesetzten Batterie oder einem eingesetzten Akkumulator erhöhen. Aufgrund der angestrebten Miniaturisierung ist insbesondere bei Hörhilfegeräten die Speicherkapazität der Spannungsquelle eng begrenzt. Eine Herabsetzung des Energiebedarfs wirkt sich somit bei diesen Geräten besonders vorteilhaft aus.
Gemäss einer einfach zu realisierenden Ausführung der Erfindung erfolgt die Veränderung der Ab-tastrate oder der Taktfrequenz durch manuelle Betätigung eines dafür vorgesehenen Bedienelements. Der Anwender des Hörhilfegeräts hat damit die Möglichkeit, selbsttätig auf den Energiebedarf des Geräts einzuwirken.
Eine andere, komfortablere Variante der Erfindung sieht vor, dass die Abtastrate für das akustische Eingangssignal und/oder die Taktfrequenz wenigstens eines digitalen Bauelements automatisch durch eine Signalanalyse- und Auswerteeinheit steuerbar sind. Wird beispielsweise erkannt, dass das Eingangssignal nur eine eingeschränkte Bandbreite aufweist, so wird die Abtastrate selbsttätig entsprechend angepasst.
Eine weitere Möglichkeit bildet ein Hörhilfegerät mit mehreren Mikrofonen zur parallelen Aufnahme mehrerer Mikrofonsignale, bei dem jedoch in einem bestimmten Betriebsmodus nicht alle Mikrofonsignale ausgewertet werden sollen. Hier kann eine Signalabtastung teilweise ganz unterbleiben und auch die Leistung eines Signalprozessors zur Verarbeitung der Eingangssignale kann entsprechend reduziert werden, was gemäss der Erfindung durch Herabsetzen der Taktfrequenz geschieht.
Eine Ausführungsform der Erfindung sieht vor, dass die Abtastrate für das Eingangssignal und/oder die Taktfrequenz wenigstens eines digitalen Bauelements vom Zustand der Spannungsquelle abhängen. Deutet sich ein Nachlassen der Spannungsversorgung an, so ist das Hörhilfegerät manuell oder automatisch in eine Art "Energiesparmodus" überführbar. Damit lässt sich zwar mit eingeschränkter Funktionalität, dafür jedoch mit reduziertem Energie-bedarf, für eine begrenzte Zeit noch ein eingeschränkter Betrieb aufrechthalten.
Moderne Hörhilfegeräte bieten dem Hörgeräteträger die Wahlmöglichkeit zwischen verschiedenen Hörprogrammen. Diese wiederum sind speziell an bestimmte Hörsituationen angepasst. Unterschiedliche Hörsituationen erfordern jedoch auch unterschiedlichen Rechenaufwand bei der Signalverarbeitung. Diesem Umstand wird nach der Erfindung durch eine entsprechend den Erfordernissen des gewählten Hörprogramms angepasste Abtastrate und Taktfrequenz Rechnung getragen. Die entsprechende Anpassung erfolgt damit manuell oder automatisch durch Wahl des Hörprogramms.
Eine weitere Möglichkeit bildet die Erfindung darin, dass mittels einer Signalanalyse- und Auswerteeinheit die augenblickliche Schallsituation, in der sich das Hörhilfegerät befindet, erkannt wird und die Einstellung der Abtastrate oder der Taktfrequenz darauf beruhend automatisch erfolgt. Ein Beispiel für eine derartige Schallsituation ist eine Umgebung mit Sprachsignalen, die von Störsignalen überlagert sind. Bietet das Hörhilfegerät beispielsweise die Möglichkeit, Eingangssignale bis maximal 10 kHz zu verarbeiten und zu übertragen, so ist bei Sprachsignalen die Übertragung und Verarbeitung bis maximal 5 kHz in der Regel ausreichend. Somit können die Ab-tastrate für das Eingangssignal und die Taktfrequenz des digitalen Signalprozessors bzw. der Systemtakt halbiert werden. Störsignale mit einer Frequenz oberhalb 5 kHz werden somit nicht mehr übertragen. Darüber hinaus können vorhandene Filter zur Störgeräuschunterdrückung im eingeschränkten Frequenzbereich bis 5 kHz entsprechend selektiver arbeiten. Wird nun wieder ein anderes Hörprogramm eingestellt, bei dem, z.B. für Musik, eine grössere Bandbreite gewünscht ist, kann der Systemtakt wieder heraufgesetzt werden. Es ist sogar denkbar, dass man den Systemtakt für klangoptimierte Hörprogramme gegenüber dem Normalwert erhöht.
Weitere Vorteile und Einzelheiten der Erfindung ergeben sich aus der nachfolgenden Beschreibung eines Ausführungsbeispiels anhand der Zeichnung und in Verbindung mit den Patentansprüchen.
In der Figur ist schematisch ein digitales Hörhilfegerät 1 mit einem akustisch/elektrischen Eingangswandler 3, einem A/D-Wandler 10 zur Abtastung und A/D-Wandlung eines Eingangssignals, einer Signalverarbeitungseinheit 4 mit einem digitalen Signalprozessor 5, einem D/A-Wandler 11 und einem elektrisch/akustischen Ausgangswandler 9 dargestellt. Weiterhin weist das Hörhilfegerät 1 einen Taktgenerator 12 mit veränderbarem Ausgangstakt, eine Signalanalyse- und Auswerteeinheit 7 sowie ein Bedien-element 6 in Form eines Tastschalters auf. Zur Spannungsversorgung des Hörhilfegeräts 1 dient eine Batterie 2.
Anders als bei dem dargestellten Ausführungsbeispiel mit einem Taktgenerator 12, der die Taktfrequenz der digitalen Bauelemente des Hörhilfegeräts 1 festlegt (Systemtakt), kann auch einzelnen Bauelementen ein eigener Taktgenerator zugeordnet und gemäss der Erfindung hinsichtlich der Taktfrequenz veränderbar sein.
Mittels des Tastschalters 6 sind verschiedene Hörprogramme wählbar. Diese sind jeweils für unterschiedliche Hörsituationen optimiert. In Abhängigkeit von dem gewählten Hörprogramm wird die Taktfrequenz für Hörgerätebauteile, wie A/D-Wandler 10, Signalprozessor 5 oder D/A-Wandler 11, sowie die Abtastrate für das Eingangssignal festgelegt. Eine weitere Möglichkeit zur Festlegung der Taktfrequenz und der Abtastrate bildet das Ausführungsbeispiel mittels der Signalanalyse- und Auswerteeinheit 7. Diese analysiert das analoge wie auch das A/D-gewandelte Eingangssignal und erkennt das Frequenzspektrum des Eingangssignals bzw. die Hörsituation, in der sich das Hörhilfegerät 1 befindet. Auch diese Auswertung beeinflusst den Taktgenerator 12. Darüber hinaus wird von den Mitteln 8 zur Prüfung der Spannungsquelle 2 deren Zustand überwacht. Nähert sich die darin gespeicherte Energie ihrem Ende, so wird durch diese Mittel 8 die Taktfrequenz reduziert und die Signalverarbeitung in einen eingeschränkten Betriebsmodus überführt. Damit ist für begrenzte Zeit noch ein eingeschränkter Betrieb des Hörhilfegeräts 1 mit der eingesetzten Batterie 2 möglich.
Claims (7)
1. Digitales Hörhilfegerät (1) mit wenigstens einer Spannungsquelle (2), einem Eingangswandler (3) zur Aufnahme eines akustischen Eingangssignals, einem Ausgangswandler (9) und einer Signalverarbeitungseinheit (4), dadurch gekennzeichnet, dass die Ab-tastrate für das Eingangssignal und/oder die Taktfrequenz wenigstens eines digitalen Bauelements (5) automatisch oder manuell veränderbar sind.
2. Digitales Hörhilfegerät (1) nach Anspruch 1, dadurch gekennzeichnet, dass die Abtastrate für das Eingangssignal und/oder die Taktfrequenz des digitalen Bauelements (5) manuell durch Betätigung eines Bedienelements (6) veränderbar sind.
3. Digitales Hörhilfegerät (1) nach Anspruch 1 mit einer Signalanalyse- und Auswerteeinheit (7) zur Analyse und Auswertung des Eingangssignals, dadurch gekennzeichnet, dass die Abtastrate für das Eingangssignal und/oder die Taktfrequenz des digitalen Bauelements (5) automatisch durch die Signal-analyse- und Auswerteeinheit (7) steuerbar sind.
4. Digitales Hörhilfegerät (1) nach Anspruch 1 mit Mitteln (8) zum Prüfen der Spannungsquelle (2), dadurch gekennzeichnet, dass die Abtastrate für das Eingangssignal und/oder die Taktfrequenz des digitalen Bauelements (5) abhängig vom Zustand der Spannungsquelle (2) einstellbar sind.
5. Digitales Hörhilfegerät nach einem der Ansprüche 1 bis 4 mit mehreren einstellbaren Hörprogrammen, dadurch gekennzeichnet, dass die Einstellung der Abtastrate für das Eingangssignal und/oder der Taktfrequenz des digitalen Bauelements (5) durch Wahl des Hörprogramms erfolgen.
6. Digitales Hörhilfegerät nach einem der Ansprüche 1 bis 5 mit einer Signalanalyse- und Auswerteeinheit (7) zum Erkennen der Schallsituation, in der sich das Hörhilfegerät (1) befindet, dadurch gekennzeichnet, dass die Einstellung der Abtastrate für das Eingangssignal und/oder der Taktfrequenz des digitalen Bauelements (5) mittels der Signalanalyse- und Auswerteeinheit (7) in Abhängigkeit von der Schallsituation, in der sich das Hörhilfegerät (1) befindet, automatisch erfolgen.
7. Digitales Hörhilfegerät nach Anspruch 6, dadurch gekennzeichnet, dass die Abtastrate für das Eingangssignal und/oder die Taktfrequenz des digitalen Bauelements (5) in einer Schallsituation mit Nutzsignalen in Form von Sprachsignalen und Störsignalen herabsetzbar sind.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19941859A DE19941859C2 (de) | 1999-09-02 | 1999-09-02 | Digitales Hörhilfegerät |
Publications (1)
Publication Number | Publication Date |
---|---|
CH694653A5 true CH694653A5 (de) | 2005-05-13 |
Family
ID=7920573
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH01581/00A CH694653A5 (de) | 1999-09-02 | 2000-08-17 | Digitales Hörhilfegerät |
Country Status (4)
Country | Link |
---|---|
US (1) | US6516073B1 (de) |
CH (1) | CH694653A5 (de) |
DE (1) | DE19941859C2 (de) |
DK (1) | DK176911B1 (de) |
Families Citing this family (414)
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US6516073B1 (en) | 2003-02-04 |
DE19941859C2 (de) | 2002-06-13 |
DK200001266A (da) | 2001-03-03 |
DK176911B1 (da) | 2010-04-19 |
DE19941859A1 (de) | 2001-03-15 |
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