8. A system comprising: one or more computers and one or more storage devices storing instructions that are operable, when executed by the one or more computers, to cause the one or more computers to perform operations comprising: receiving, by a given mobile device, audio data corresponding to a user utterance; while receiving the audio data corresponding to the user utterance, determining, by the given mobile device, that the given mobile device has changed position from a first pose to a second pose; in response to determining that the given mobile device has changed position from the first pose to the second pose, determining endpointing parameters for endpointing audio data received by a mobile device changing from the first pose to the second pose; using the endpointing parameters for endpointing audio data received by a mobile device changing from the first pose to the second pose, endpointing the received audio; generating, by an automated speech recognizer, a transcription of the endpointed audio data; and providing, for output by the given mobile device, the transcription.
8. A system comprising: one or more computers and one or more storage devices storing instructions that are operable, when executed by the one or more computers, to cause the one or more computers to perform operations comprising: receiving, by a given mobile device, audio data corresponding to a user utterance; while receiving the audio data corresponding to the user utterance, determining, by the given mobile device, that the given mobile device has changed position from a first pose to a second pose; in response to determining that the given mobile device has changed position from the first pose to the second pose, determining endpointing parameters for endpointing audio data received by a mobile device changing from the first pose to the second pose; using the endpointing parameters for endpointing audio data received by a mobile device changing from the first pose to the second pose, endpointing the received audio; generating, by an automated speech recognizer, a transcription of the endpointed audio data; and providing, for output by the given mobile device, the transcription. 11. The system of claim 8 , wherein determining the endpointing parameters for endpointing audio data received by a mobile device changing from the first pose to the second pose comprises determining a speech energy threshold for endpointing audio data received by a mobile device changing from the first pose to the second pose.