soundproofing quality; sound insulating properties
Refers to the degree or property of blocking or absorbing sound, often used in technical or product descriptions.
This wall has high soundproofing quality, so it's hard to hear sounds from the next room.
I chose double-glazed windows, prioritizing sound insulation.
遮音性 emphasizes blocking sound transmission, whereas 防音性 is a broader term that can include both blocking and absorbing sound.
Compound of 防音 (soundproofing) + 性 (property, nature).