In an example, a computing device includes a microphone array, a first antenna, a second antenna, and a processor. The microphone array includes a first microphone and a second microphone that collectively produce a beam to collect an audio sample from an audio source. The first antenna and the second antenna are positioned in proximity to the microphone array and collectively produce a field of microwave radiation. The processor tracks a position of the audio source relative to the computing device using microwave image processing and steers a direction of the beam in response to the position of the audio source.