METHODS AND APPARATUS TO ENFORCE A POWER OFF STATE OF AN AUDIENCE MEASUREMENT DEVICE DURING SHIPPING
First Claim
1. An audience measurement device, comprising:
- a housing;
a media detector in the housing to collect media exposure data;
a packaging sensor to receive an audio signal;
a packaging detector to generate a frequency spectrum of the detected audio signal, to determine an energy of a first frequency associated with the generated frequency spectrum, to determine an energy of a second frequency higher than the first frequency and associated with the generated frequency spectrum, to compare the difference between the energy of the first frequency and the second frequency to a threshold to determine whether the device is located within a package.
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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.
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Citations
26 Claims
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1. An audience measurement device, comprising:
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a housing; a media detector in the housing to collect media exposure data; a packaging sensor to receive an audio signal; a packaging detector to generate a frequency spectrum of the detected audio signal, to determine an energy of a first frequency associated with the generated frequency spectrum, to determine an energy of a second frequency higher than the first frequency and associated with the generated frequency spectrum, to compare the difference between the energy of the first frequency and the second frequency to a threshold to determine whether the device is located within a package. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 25, 26)
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15. A method of enforcing a reduced power state in an audience measurement device during shipping of the device, comprising:
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receiving an audio signal from a sensor indicative of a noise level outside the audience measurement device; determining a frequency spectrum associated with the received audio signal; determining an energy level in a first frequency band of the determined frequency spectrum; determining an energy level in a second frequency band of the determine frequency spectrum, wherein the second frequency band is higher than the first frequency band; calculating a difference between the energy of the first frequency band and the energy of the second frequency band; comparing the difference between the energy of the first frequency band and the energy of the second frequency band to a muffling threshold; and transitioning the audience measurement device to a reduced power state if the difference between the energy of the first frequency band and the energy of the second frequency band is greater than the muffling threshold. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23)
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24. A machine readable medium having instructions stored thereon that, when executed by a processor, cause a machine to:
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receive an audio signal from a sensor indicative of a noise level outside the audience measurement device; determine a frequency spectrum associated with the received audio signal; determine an energy level in a first frequency band of the determined frequency spectrum; determine an energy level in a second frequency band of the determine frequency spectrum, wherein the second frequency band is higher than the first frequency band; calculate a difference between the energy of the first frequency band and the energy of the second frequency band; compare the difference between the energy of the first frequency band and the energy of the second frequency band to a muffling threshold; and power off at least a portion of the audience measurement device if the difference between the energy of the first frequency band and the energy of the second frequency band is greater than the muffling threshold.
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Specification