Headset and earphone
First Claim
1. A headset or earphone, comprisingan electro-acoustic reproduction transducer having an oscillator coil arranged in an axis;
- an amplifier coupled to the electro-acoustic reproduction transducer;
a magnetic interference sensor configured to measure a magnetic interference field that (1) is experienced by the electro-acoustic reproduction transducer and that (2) generates an acoustic noise signal by inducing an electrical current into the oscillator coil;
a correction unit, coupled to the magnetic interference sensor, configured to analyze an output of the magnetic interference sensor and to produce a compensation signal; and
an adding unit configured to add the compensation signal to an input signal and for outputting the result to the amplifier to cancel the acoustic noise signal generated in the oscillator coil of the transducer by the magnetic interference field.
1 Assignment
0 Petitions
Accused Products
Abstract
A headset or earphone is provided, having an electro-acoustic reproduction transducer with an oscillator coil arranged in an axis. An amplifier is coupled to the electro-acoustic reproduction transducer. The headset or earphone also has a magnetic interference sensor for measuring a magnetic interference field. A correction unit, for analyzing an output of the magnetic interference sensor and for producing a compensation signal, is coupled to the magnetic interference sensor. In addition, the headset or earphone also includes an adding unit for adding the compensation signal to an input signal and for outputting the result to the amplifier.
16 Citations
9 Claims
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1. A headset or earphone, comprising
an electro-acoustic reproduction transducer having an oscillator coil arranged in an axis; -
an amplifier coupled to the electro-acoustic reproduction transducer; a magnetic interference sensor configured to measure a magnetic interference field that (1) is experienced by the electro-acoustic reproduction transducer and that (2) generates an acoustic noise signal by inducing an electrical current into the oscillator coil; a correction unit, coupled to the magnetic interference sensor, configured to analyze an output of the magnetic interference sensor and to produce a compensation signal; and an adding unit configured to add the compensation signal to an input signal and for outputting the result to the amplifier to cancel the acoustic noise signal generated in the oscillator coil of the transducer by the magnetic interference field. - View Dependent Claims (2, 3, 5, 7)
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4. A headset or earphone, comprising:
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an active noise reduction unit adapted to actively compensate any noise detected by a microphone; an electro-acoustic reproduction transducer having an oscillator coil; an amplifier coupled to the electro-acoustic reproduction transducer; a magnetic interference sensor configured to measure a magnetic interference field that (1) is experienced by the electro-acoustic reproduction transducer and that (2) generates an acoustic noise signal by inducing an electrical current into the oscillator coil; a correction unit, coupled to the magnetic interference sensor, configured to analyze an output of the magnetic interference sensor and to produce a compensation signal; and an adding unit configured to add the compensation signal and an output signal of the active noise reduction to an input signal and to output the result to the amplifier to cancel the acoustic noise signal generated in the oscillator coil of the transducer by the magnetic interference field. - View Dependent Claims (8)
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6. A headset or earphone, comprising:
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an electro-acoustic reproduction transducer having an oscillator coil; an amplifier comprising an electrical output resistance, the amplifier being coupled to the electro-acoustic reproduction transducer so that the oscillator coil and the electrical output resistance form a closed electrical-circuit loop; a magnetic interference sensor arranged such that it detects a magnetic interference field that (1) is experienced by the electro-acoustic reproduction transducer and that (2) generates an acoustic noise signal by inducing an electrical current into the closed electrical-circuit loop; a correction unit, coupled to the magnetic interference sensor, configured to analyze an output of the magnetic interference sensor and to produce a compensation signal; and an adding unit configured to add the compensation signal to an input signal and to output the result to the amplifier to cancel the acoustic noise signal generated in the closed electrical-circuit loop of the oscillator coil and the electrical output resistance by the magnetic interference field. - View Dependent Claims (9)
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Specification