3. The system of claim 1 , the acts further comprising: generating first responsive speech in response to receiving the far-field audio using a first text-to-speech (TTS) model; generating second responsive speech in response to receiving the near-field audio using a second TTS model; wherein the second TTS model is different from the first TTS model.
1. A system comprising: a base device configured to operate from a fixed location to capture far-field audio containing first user speech in response to a user speaking a keyword; a handheld device configured to operate from a moveable location to capture near-field audio containing second user; a speech service configured to perform acts comprising: receiving a first audio signal from the base device, the first audio signal corresponding to the far-field audio; performing automatic speech recognition (ASR) on the first audio signal using a first ASR model to obtain first ASR results, wherein the first ASR model was trained using far-field audio signals; receiving a second audio signal from the handheld device, the second audio signal corresponding to the near-field audio; performing ASR on the near-field audio using a second ASR model to obtain second ASR results, wherein the second ASR model was trained using near-field audio signals; performing natural language understanding (NLU) on the first ASR results using a first NLU model to determine a first meaning of the first user speech, wherein the first NLU model was trained using ASR results from far-field audio signals; performing NLU on the second ASR results using a second NLU model to determine a second meaning of the second user speech, wherein the second NLU model was trained using ASR results from near-field audio signals.