As an illustrative example, FIG. 6B shows an example first sound specimen. In this example, the sound specimen corresponds to detected-sound data that is streamed, e.g., as part of the sound-data stream SDS. This detected-sound data can include audio frames associated with the spotted wake word 680a of FIG. 6A. As illustrated, the example first sound specimen comprises sound detected in the NMD 503's (FIG. 5) environment (i) immediately before a wake word was spoken, which may be referred to as a pre-roll portion (between times t0 and t1), (ii) while the wake word was spoken, which may be referred to as a wake-meter portion (between times t1 and t2), and/or (iii) after the wake word was spoken, which may be referred to as a post-roll portion (between times t2 and t3). Other sound specimens are also possible.
