Method of detecting speech and speech detector for low signal-to-noise ratios

A speech detector comprising:

• an input configured to obtain a plurality of separate frequency band signals based on a microphone signal, the frequency band signals comprising a first frequency band signal in a first frequency band, and a second frequency band signal in a second frequency band
• a processing unit configured to:
• determining a first stationary noise power signal associated with the first frequency band;
• determining a first clean power signal associated with the first frequency band;
• determining a second stationary noise power signal associated with the second frequency band;
• determining a second clean power signal associated with the second frequency band;
• determine an onset of voiced speech that is associated with the first frequency band based on the first stationary noise power signal and the first clean power signal;
• and
• determine an onset of unvoiced speech that is associated with the second frequency band based on the second stationary noise power signal and the second clean power signal;
• wherein the speech detector is configured to provide a speech flag or marker for a communication device, wherein the communication device is configured to adjust a signal processing parameter based on the speech flag or the marker, and to provide an acoustic signal for transmission into an ear canal of a user, wherein the communication device is configured to generate the acoustic signal based on the signal processing parameter.