About the Authors
Ear Institute, University College London, London, United Kingdom
NTT Communication Science Laboratories, NTT Corporation, Atsugi, Japan
Makio Kashino is employed by NTT Communication Science Laboratories, NTT Corporation, Japan. No other authors have any competing interests to declare. This does not alter the authors' adherence to all the PLOS ONE policies on sharing data and materials.
Conceived and designed the experiments: FC LP MK MC. Performed the experiments: FC LP SP. Analyzed the data: FC LP SP MC. Wrote the paper: FC LP MK MC.