Abstract: The acoustical design of concert halls is one of the hot topics in the field of room acoustics. Extensive research on this subject has shown great advancement during the past few decades. These new discoveries greatly benefit our concert hall designers and researchers. The following four related aspects are discussed:(1) determinations of the perceived loudness, clarity and bass index in halls for music, (2) shaping of the hall related to good acoustics, and choice of proper seating, (3) problems to be noted in designing coupled-space concert halls, and (4) listener envelopment LEV and apparent source width ASW for evaluating the subjective impression of the spaciousness in hall design practice.