Unverified85% confidenceFactTime unknown
实际佩戴衰减通常只有标称NRR的一半左右，因为标称值是实验室理想插入条件，选购时NRR标称值预留冗余
1
Sources
85%
Confidence
Long-term
Relevance
-
First Seen
Sources
Related Entities
Related Claims
Unverified实验室标注的NRR是理想佩戴值，实际佩戴衰减往往降低7-10dB，选购时可按标称值减7dB估算真实效果85% similarUnverified耳塞标称NRR值是实验室理想佩戴数据，实际佩戴衰减通常只有标称值的50%-70%，选购时不要只看数字而忽略佩戴贴合度82% similarUnverifiedNRR标称值需在实际使用中打折，佩戴不到位实际衰减仅为标称值的50-70%，深插式比浅塞式更接近标称隔音80% similarUnverified尺码越大回复反射材料面积越大越易达高等级认证，但套在羽绒服外时需选比日常大1-2码的宽松版型，注意认证等级是按对应尺码测定的64% similarUnverified尺码覆盖范围广的均码/弹性款支撑精准度往往下降，足弓位置对不准，鞋码偏大或偏小者应选分码款而非均码款64% similar
Cite This Claim
Stable URI
https://kongchang.com/claim/177541API
curl https://kongchang.com/api/v1/knowledge/claims/177541MCP
get_claim(id=177541)