[KongchangAI]
Unverified75% confidenceTradeoffTime unknown

熊铃有效性存在争议:铃声可提前警告黑熊避免遭遇,但研究表明棕熊/灰熊对持续低频人声反应更强,密林或水流噪音大的环境铃声穿透力有限,不能替代喷雾

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