A Study of Speech Information Leakage Prevention Methods Based on the Listening Ability of Consonants for Semi-Closed Work booths

Abstract

Semi-closed work booths have the advantage of being low-cost and easy to install. However, they are not as effective as closed work booths in terms of sound insulation performance due to their open areas. Consequently, there is a concern regarding the potential for speech information leakage in the context of web conferencing and telecommuting. In the case of a semi-closed work booth with sound insulation measures, it is challenging to improve the sound insulation performance in the low-frequency range due to the presence of an open areas, while some improvement in sound insulation performance can be expected in the high-frequency range. Therefore, this study focused on listening to consonants that have a lot of energy in the high-frequency range. We present a method for preventing speech information leakage by controlling sound pressure in the high-frequency range using word intelligibility tests.