In fact, a lower speech reception threshold in noise was found with learned settings.
The steepest slope in performance decrease appeared at a lower speech intelligibility value than predicted by Hongisto [1].
The open ceiling meeting rooms have advantages of low cost construction and flexibility, but have lower speech privacy than that of enclosed rooms due to the open ceiling.
Renovations often put too much emphasis on adding sound absorption to control reverberation, at the expense of lower speech levels, particularly at the backs of classrooms.
It can easily be seen that the proposed method outperforms the conventional one, as it provides lower speech distortions and higher noise attenuation.
Methods such as fixed and adaptive beamforming and multichannel Wiener filtering are generally capable of better noise suppression and lower speech distortion than single-channel methods [9, 11].
The objective measurements show that the signal subspace approach outperforms the conventional one providing higher noise attenuation and lower speech distortion.
Namely, the larger noise reduction can be yielded as γ(k) decreases, and the lower speech distortion can be achieved when γ(k) increases.
