Unverified82% confidenceDecision RuleTime unknown

主动降噪深度看被动隔音+ANC协同，实测低频降噪量≥30dB(1kHz以下)才能有效压制地铁/飞机引擎噪音；仅标称'降噪35dB'不等于全频段，需看是否覆盖100-1000Hz中低频

1

Sources

82%

Confidence

Long-term

Relevance

-

First Seen

Sources

Related Entities

蓝牙耳机category

Related Claims

Unverified长途飞行/地铁通勤选主动降噪(ANC)机型时，看降噪深度参数≥40dB才能有效压制发动机低频轰鸣，单纯被动隔音的入耳式最多衰减25-30dB且对低频无能为力93% similar Unverified主动降噪深度≥40dB且覆盖100-1000Hz中低频段，才能有效压制飞机引擎、地铁轰鸣等持续性低频噪声；单纯标称降噪等级不看频段覆盖会踩坑92% similar Unverified主动降噪深度看低频衰减量，飞机/地铁引擎噪声集中在100-500Hz，降噪量≥30dB才能明显消除轰鸣感，宣传的'最高降噪45dB'通常只在极窄频段成立90% similar

Cite This Claim

Stable URI

https://kongchang.com/claim/476478

API

curl https://kongchang.com/api/v1/knowledge/claims/476478

MCP

get_claim(id=476478)