Apple 96W Power Adapter making intermittent noise when charging Macbook Pro

[pointofgravity]

Hi.

I have a 96W Apple USB-C Power Adapter that is making an intermittent buzzing noise at 6kHz every 2 seconds when charging my Macbook Pro with it. I have already gone through the replacement process (the agent would not hear a recording of the buzzing I took) but the replacement charger still makes this noise.

I have recorded the noise and isolated it, which can be found here. For those that don't want to/can't listen to audio, you can see the file put through a spectrum analyser like Academo.org here. As you can see/hear, it is an intermittent noise at 6kHz. This happens when I am charging the Macbook, but seems to stop when the macbook's charge has reached 100%, indicating it is something to do with the power conversion.

I am really puzzled with this, and I want to get it resolved as I use my macbook for some bedroom guitar recording, and with the noise active, my guitar pickups pick this noise up and I end up having to kill 6Khz in my recordings, which is not ideal.

Can anyone tell me what this is?

 

[jz0309]

Hi.

I have a 96W Apple USB-C Power Adapter that is making an intermittent buzzing noise at 6kHz every 2 seconds when charging my Macbook Pro with it. I have already gone through the replacement process (the agent would not hear a recording of the buzzing I took) but the replacement charger still makes this noise.

I have recorded the noise and isolated it, which can be found here. For those that don't want to/can't listen to audio, you can see the file put through a spectrum analyser like Academo.org here. As you can see/hear, it is an intermittent noise at 6kHz. This happens when I am charging the Macbook, but seems to stop when the macbook's charge has reached 100%, indicating it is something to do with the power conversion.

I am really puzzled with this, and I want to get it resolved as I use my macbook for some bedroom guitar recording, and with the noise active, my guitar pickups pick this noise up and I end up having to kill 6Khz in my recordings, which is not ideal.

Can anyone tell me what this is?

have you tried different circuit in your house?

 

[pointofgravity]

have you tried different circuit in your house?

I hadn't thought of that, I will try that and update this thread when I have.

 

[Fishrrman]

Aside from the noise...
- Does the charger work ok? Charge the MBP properly?
- Does the MBP run ok? Do everything that it's supposed to do?

 

[pointofgravity]

Aside from the noise...
- Does the charger work ok? Charge the MBP properly?
- Does the MBP run ok? Do everything that it's supposed to do?

Hello, yes, the Macbook Pro runs and functions normally. It holds a decent charge and haven't noticed it running out of charge quickly. I didn't have a chance to test a different circuit yesterday, so I will try and do that later today.