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在厅堂音质评价的各项指标中，响度是最重要的参量之一。然而目前厅堂响度评价问题一直未获妥善解决。本文第二作者曾建议采用乐队齐奏强音标志乐段的平均声压级ＬｐＦ作为评价厅堂响度的指标，得到国际声学界的重视。本文将进一步论证ＬｐＦ作为响度评价指标的可行性，提出厅堂中ＬｐＦ指标的计算方法。本文还将通过实测、听众主观听音调查和汇总专家意见，进一步探求ＬｐＦ的优选值域，从而对不同容积的厅堂提出关于合适的乐队规模的建议，以保证厅堂在演出过程中具有合适的响度。
Among the indicators of the auditorium’s sound quality, loudness is one of the most important parameters. However, at present, the problem of loudness evaluation in the auditorium has not been properly solved. The second author of this paper proposed to use the LpF, an average sound pressure level of the band, to obtain the loudness of the auditorium and get the attention of the international acoustic community. This article will further demonstrate the feasibility of LpF as a loudness evaluation index and put forward the calculation method of LpF index in hall. This article will further investigate the preferred range of LpF through surveying, listener subjective listening investigation and summarizing expert opinions, so as to propose different sizes of the hall for the appropriate band size so as to ensure that the auditorium has an appropriate loudness during the performance .