Methods and apparatus to enforce a power off state of an audience measurement device during shipping
First Claim
1. A method of operating a media detector, comprising:
- placing a media detector in a shipping power mode in which the media detector is at least partially powered down;
collecting audio data at the media detector;
comparing a first threshold to a difference between a first characteristic of the audio data at a first frequency and a second characteristic of the audio data at a second frequency;
determining whether the comparison of the first threshold and the difference indicates that the media detector is likely in a package; and
maintaining the media detector in the shipping power mode when the comparison indicates that the media detector is likely in the package.
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Accused Products
Abstract
Methods and apparatus to enforce a power off state of an audience measurement device during shipping of the device are disclosed herein. An example portable audience measurement device includes a housing, a media detector in the housing to collect media exposure data, and a packaging sensor to receive an audio signal. A packaging detector generates a frequency spectrum of the detected audio signal, determines an energy of a first frequency associated with the generated frequency spectrum, determines an energy of a second frequency higher than the first frequency and associated with the generated frequency spectrum, and compares the difference between the energy of the first frequency and the second frequency to a muffling threshold to determine whether the device is located within a package.
201 Citations
20 Claims
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1. A method of operating a media detector, comprising:
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placing a media detector in a shipping power mode in which the media detector is at least partially powered down; collecting audio data at the media detector; comparing a first threshold to a difference between a first characteristic of the audio data at a first frequency and a second characteristic of the audio data at a second frequency; determining whether the comparison of the first threshold and the difference indicates that the media detector is likely in a package; and maintaining the media detector in the shipping power mode when the comparison indicates that the media detector is likely in the package. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A tangible machine readable storage device comprising instructions that, when executed, cause a machine to at least:
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place a media detector in a shipping power mode in which the media detector is at least partially powered down; collect audio data at the media detector; compare a first threshold to a difference between a first characteristic of the audio data at a first frequency and a second characteristic of the audio data at a second frequency; determine whether the comparison of the first threshold and the difference indicates that the media detector is likely in a package; and maintain the media detector in the shipping power mode when the comparison indicates that the media detector is likely in the package. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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17. An apparatus, comprising:
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a media detector to collect information for identification of media to which the apparatus is exposed; a memory to store the information collected by the media detector; and a packaging detector to; collect audio data; compare a first threshold to a difference between a first characteristic of the audio data at a first frequency and a second characteristic of the audio data at a second frequency; and when the comparison of the first threshold and the difference indicates that the apparatus is likely in a package, power down the media detector and maintain power to the memory. - View Dependent Claims (18, 19, 20)
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Specification