alphatronics Sound 5 ANC Mode D'emploi page 14

Connection via audio cable
With ANC:
Without ANC: With the headphones switched off, connect the headphone audio jack to the
When using a cabled connection, music playback is controlled by your smartphone or other
device.
ANC function (active noise cancellation)
The noise-cancelling function uses the built-in microphone to detect external noise and then
sends equivalent noise-cancelling signals to the headphones.
The noise-cancelling effect may not be noticeable in very quiet environments.
The noise-cancelling effect can vary depending on how you use the headphones, or you may
hear a buzzing (squeaking) sound. If this happens, switch the headphones off and on again.
The noise-cancelling function is mainly effective for low-frequency noise. Noise can be
reduced, but it cannot be completely eliminated.
Your phone can cause interference and noise. If this happens, unplug/unpair the headphones
from the phone.
Do not cover the microphone with your hand as this restricts the noise-cancelling function and
can lead to a buzzing (squeaking) sound.
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Switch on "ANC". Connect the headphone audio jack to the audio output of
your smartphone or other product using the audio cable.
audio output of your smartphone or other product using the audio cable.