防音 and 遮音: overlapping soundproofing meanings
Compare 防音材 and 防音工事 with 遮音 applied to walls or a door. Read the overlapping soundproofing meanings while identifying installed material, the purpose of work, and an expert's assessment.
防音: material and soundproofing work
防音, read ぼうおん, means soundproofing. 「音楽室の壁に防音材を取り付けた。」 says soundproofing material was installed on the music room walls. 防音材 names the installed material.
「夜に練習できるよう部屋に防音工事を施した。」 says the room was soundproofed so that practice at night would be possible. 防音工事 names the work, and 夜に練習できるよう expresses its purpose.
遮音: wall treatment and an assessed effect
遮音, read しゃおん, also refers to soundproofing. 「工事では、隣室の音を防ぐため壁に遮音を施した。」 says the wall was soundproofed during construction to block noise from the next room. The wall is the treated object.
「専門家が、扉に施した遮音の効果を調べた。」 says an expert assessed the soundproofing applied to the door. 遮音の効果 names the effect assessed. 調べた does not itself establish that a particular performance level was reached.
Read the names with their objects
Both 防音 and 遮音 connect with soundproofing in these examples. Rather than assigning outgoing sound exclusively to 防音 and incoming sound exclusively to 遮音, read the combinations naming material, work, treatment, and effects.
防音材 names the installed material; 遮音の効果 names the effect of the treatment applied. Installing material and assessing an effect have different objects. Neither example supplies a complete-removal result or a numerical removal rate.
What do 防音材 and 遮音の効果 name in examples where both words connect with soundproofing?
Show the answer and why
防音材 names the installed soundproofing material. 遮音の効果 names the effect of the soundproofing applied to the door. The meanings overlap; the examples do not establish an exclusive outgoing-versus-incoming sound distinction. Read each word with its material, treatment, or effect.