Abstract: A wearable device with a microphone acquires audio data of a wearer's speech. The audio data is processed to determine sentiment data indicative of perceived emotional content of the speech. For example, the sentiment data may include values for one or more of valence that is based on a particular change in pitch over time, activation that is based on speech pace, dominance that is based on pitch rise and fall patterns, and so forth. A simplified user interface provides the wearer with information about the emotional content of their speech based on the sentiment data. The wearer may use this information to assess their state of mind, facilitate interactions with others, and so forth.