System and methods for processing audio signals are disclosed. In one implementation, a system may comprise a wearable camera configured to capture images from an environment of a user; a microphone; and a processor. The processor may be configured to receive an audio signal representative of sounds captured by the microphone during a time period; and receive the images captured by the wearable camera. The processor may process the audio signal in a first mode based on audio data accumulated in a buffer prior to the time period; detect a change in the active speaker from the first individual to a second individual; and cease processing in the first mode and process the audio signal in a second mode that differs from the first mode.