Intelligibility comparison of speech annotation under wind noise in AAR systems for pedestrians and cyclists using two output devices

Since visual navigation systems using smart phones show information on small screens, user attention is likely to be distracted. Therefore, we are considering a portable navigation system using Augmented Audio Realty. However, if such equipment is used outdoors, very loud wind noise is recorded with the environmental sound. Thus, to reduce this wind noise, we use wind screen (ear muffs) and applied signal processing for wind noise reduction. In this paper, we compared a noise-controlled binaural earphone, and a bone conduction headphone. It was shown that Iterative Wiener filtering improves the speech intelligibility score dramatically with the former device.