This system is also equipped with "PILOTONE" and the latest "NOISE LOCK" dual-squelch circuit that will eliminate the random noise interference when the receiver is at its standby state.

本系统装备有“PILOTONE” 和最新的“噪音锁” 双重消杂音电路，当接收器在它的待命状态时，它可消除随机的噪音干扰。

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There are no plans to de-grunt top grunters it appears Sharapova and Azarenka's grunts will be grandfathered in but there's a push to squelch the noise at younger levels, and produce a quieter next generation of players.

WSJ: Jason Gay: Confessions of a Tennis Grunter