Utilizing pre-event and post-event input streams to engage an automated assistant

A system comprising one or more processors and memory storing instructions that, in response to execution of the instructions by the one or more processors, cause the one or more processors to perform the following operations:

• executing an automated assistant in an inactive listening state at least in part on a computing device operated by a user;
• while in the inactive listening state, detecting an event that triggers transition of the automated assistant from the inactive listening state into an active listening state, wherein first data indicative of sound captured by one or more microphones prior to the event is temporarily stored, as a pre-event input stream, in a memory buffer of the computing device operated by the user;
• obtaining, as a post-event input stream, second data indicative of sound captured by one or more of the microphones after detecting the event;
• while in the active listening state, determining respective measures of fitness of the pre-event and post-event input streams for triggering responsive action by the automated assistant;
• based on the respective measures of fitness, selecting the pre-event input stream or post-event input stream;
• and
• causing the automated assistant to perform one or more responsive actions based on the selected input stream.

At least one non-transitory computer-readable medium comprising instructions that, in response to execution of the instructions by one or more processors, cause the one or more processors to perform the following operations:

• executing an automated assistant in an inactive listening state at least in part on a computing device operated by a user;
• while in the inactive listening state, detecting an event that triggers transition of the automated assistant from the inactive listening state into an active listening state, wherein first data indicative of sound captured by one or more microphones prior to the event is temporarily stored, as a pre-event input stream, in a memory buffer of the computing device operated by the user;
• obtaining, as a post-event input stream, second data indicative of sound captured by one or more of the microphones after detecting the event;
• while in the active listening state, determining respective measures of fitness of the pre-event and post-event input streams for triggering responsive action by the automated assistant;
• based on the respective measures of fitness, selecting the pre-event input stream or post-event input stream;
• and
• causing the automated assistant to perform one or more responsive actions based on the selected input stream.