Wearable electronic device for emitting a masking signal

A wearable electronic device comprising:

• an electro-acoustic input transducer configured to:
• pick up an acoustic signal, and
• convert the acoustic signal to a microphone signals (x);
• a loudspeaker;
• and
• a processor comprising:
• a voice activity detector configured to detect voice activity based on processing time-domain waveforms of the microphone signals (x) by:
• generating frames comprising frequency-time representations of the waveforms of the microphone signal (x), and
• detecting the voice activity only when voice activity is determined to be in a predefined number of consecutive frames;
• a machine learning component configured to:
• generate a voice activity signal (y), concurrently with the microphone signal (x), by indicating periods of time in which the microphone signal (x) includes signal components that represent detected voice activity and signal components that represent detected voice inactivity;
• and
• wherein the generated voice activity signal (y) is sequentially indicative of at least one voice activity and voice inactivity;
• control a volume of a masking signal (m) in response to the generated voice activity signal (y) to be at a first volume when the generated voice activity signal (y) is indicative of voice activity and to be at a second volume when the generated voice activity signal (y) is indicative of voice inactivity;
• and
• supply the masking signal (m) to the loudspeaker.