AUDIOMETER WITH INTERCHANGEABLE TRANSDUCER
First Claim
1. A method of calibrating an audiometer and earphones for audiometric testing, the method comprising:
- normalizing a voltage output level of the audiometer;
performing acoustical calibration of the earphones independent from the audiometer to calculate correction factors for a variety of frequencies;
storing the calculated correction factors in an integrated circuit chip associated with the earphones;
connecting the earphones to the audiometer;
reading the calculated correction factors into the audiometer from the integrated circuit chip associated with the earphones; and
creating a composite calibration table based on the calculated correction factors to set final adjustment factors for outputting audible test tones from the audiometer.
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Accused Products
Abstract
An audiometer including a processor controlled test signal generator is adjustable so as to produce a uniform output signal when coupled with a transducer load. Each transducer set to be used with the test signal generator includes recordable indicia in written or electronic form, upon which correction values for adjusting the electronic signal output of the audiometer module to produce a desired sound output from the each transducer in the transducer set. When the transducer set is connected to the audiometer module, the correction values are either retrieved automatically from the electronic indicia, which may be an EEPROM, or are input to the processor manually by a user through an interface such as a keyboard. These correction values are then used by the processor to dynamically adjust the output of the audiometer to correct for sound output response deviation of each transducer in the transducer set.
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Citations
26 Claims
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1. A method of calibrating an audiometer and earphones for audiometric testing, the method comprising:
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normalizing a voltage output level of the audiometer; performing acoustical calibration of the earphones independent from the audiometer to calculate correction factors for a variety of frequencies; storing the calculated correction factors in an integrated circuit chip associated with the earphones; connecting the earphones to the audiometer; reading the calculated correction factors into the audiometer from the integrated circuit chip associated with the earphones; and creating a composite calibration table based on the calculated correction factors to set final adjustment factors for outputting audible test tones from the audiometer. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A calibrated audiometric testing system comprising:
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an audiometer having a normalized voltage level output; and a set of independently acoustically calibrated earphones connected to the audiometer, the earphones including an integrated circuit chip having calibration information stored thereon;
wherein the audiometer is operable to read the calibration information from the integrated circuit chip and create a calibration table based on the calibration information to set final adjustment factors for outputting audible test tones. - View Dependent Claims (9, 10, 11, 12, 13)
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14. A method of calibrating an audiometer and transducer for audiometric testing, the method comprising:
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standardizing an output signal of the audiometer; performing acoustical calibration of the transducer independent from the audiometer to calculate correction values for a variety of frequencies; storing the calculated correction values in electronic memory associated with the transducer; connecting the transducer to the audiometer; reading the calculated correction values into the audiometer from the electronic memory associated with the transducer; and creating a composite calibration table based on the calculated correction values to set final adjustment factors for outputting audible test tones from the audiometer. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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21. A calibrated audiometric testing system comprising:
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an audiometer having a standardized output level; and an independently acoustically calibrated transducer connected to the audiometer, the transducer including electronic memory having calibration information stored therein; wherein the audiometer is operable to read the calibration information from the electronic memory and create a calibration table based on the calibration information to set final adjustment factors for outputting audible test tones. - View Dependent Claims (22, 23, 24, 25, 26)
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Specification