| CPC H04B 11/00 (2013.01) [H04B 7/15521 (2013.01); H04B 10/116 (2013.01)] | 10 Claims |

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1. A method comprising,
transmitting an audible signal and an associated inaudible signal to a plurality of user devices, wherein the associated inaudible signal comprises a wake command for each of at least two of the plurality of user devices;
receiving a response message from at least two of the plurality of user devices;
determining if one or more of the received response messages is not redundant; and
transmitting at least one response message that is not redundant to a content service.
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