Use external sound control

External sound control switches between noise cancelling and ambient sound.
1.
While wearing the earphones, touch and hold touch sensor (R) for about 2 seconds.
The mode switches between noise cancelling and ambient sound every time you touch and hold.
(A voice prompt will notify you of the mode you switched to.)
The default setting is “Noise cancelling”.
Note:
The [Technics Audio Connect] app allows you to turn off external sound control.
Noise Cancelling: Reduces sound (noise) from the surroundings. While using noise cancelling, you may hear a slight noise from the noise reduction circuit, but this is not a malfunction. (You may hear this slight noise in quiet places or during the silence between songs.)
Ambient Sound: The microphones capture sound from the surroundings and play it on the earphones. You can hear sounds from your surroundings such as train announcements while wearing the earphones.