When shoes slide across a floor, wave-like deformations of the sole can generate squeaking. The pitch of the squeak depends on the rate at which deformations are generated.
一是 “软件定义硬件”。全球销量突破70万台的Plaud的录音卡片是一个范本，其超薄录音设备本身并非利润中心，甚至可能以成本价销售，真正的价值在于，它通过硬件这一无可替代的物理入口，切入“会议记录”这一高频刚需场景，将用户锁定在后续的AI转写、摘要生成等订阅服务中。
。爱思助手下载最新版本对此有专业解读
Lex: FT's flagship investment column
discipline was immature.
Publication date: 28 February 2026