Transcriber’s Notes

Punctuation, hyphenation, and spelling of English words were made

consistent when a predominant preference was found in the original

book; otherwise they were not changed. The spellings of non-English

words were not changed.

Simple typographical errors were corrected; unbalanced quotation

marks were remedied when the change was obvious, and otherwise left

unbalanced.

Illustrations in this eBook have been positioned between paragraphs

and outside quotations. In versions of this eBook that support

hyperlinks, the page references in the List of Illustrations lead to

the corresponding illustrations.

Footnotes have been sequentially numbered and placed together at the

end of the book.

Acoustics of auditoriums · 第 27 / 27 题