Why your Galaxy Buds3/Buds3 Pro make a screeching sound when you hold them

When Active noise canceling, Adaptive, or Ambient sound is enabled, the sound coming through the sub-microphone (located on the top outer edge of your earbuds) is adjusted according to the noise control mode and delivered to the user through the speaker.

However, if you touch or cover the area around the sub-microphone while putting your Galaxy Buds on, taking them off, or adjusting them, the microphone may detect sound and cause a beeping or howling noise.

Position of the sub-microphone