I've already tested my earbuds out on my computer and my guitar amp by moving around and constants flapping the wires and pushing them, so the problem is isolated to my iPhone only (I have the iPhone SE). It's weird because the sound almost cuts out for a second, then the volume turns down to a very quiet setting, and after a second or so the volume will turn back up to what it was originally.
Notes:
- I'm not using Apple earbuds.
- I have an iPhone SE.
Best Answer
My guess would be that you are in a noisy environment, using your earphones, as you say, plugged into your phone.
This happened to my while riding my motorbike with earphones on. The built-in microphone is being hit by a lot of noise, and then the signal is sent and your phone OS tries to protect you by lowering the volume.
Try the same earphones with some tape on the microphone (a tiny hole somewhere on the earphones), or try them in any situation without a lot of outside noise.
If they work ok, your problem is what I'm telling you about.
There is a few choices you can take to fix your problem. I'll state them so the first options are the cheapest or more reasonable ones.
1. Search for a setting on you IOS, or an app to make volume not depend on outside noise. There is some apps that lock the volume level I think.
2 Put some tape or whatever you consider to make your microphone deaf.
3 Change earphones to ones without built-in mic.