Electrical sound lightning headphones

Hello abdennour112,

Thank you for using Apple Support Communities. It's my understanding that you're hearing crackling or popping sounds when using headphones with your iPhone 7. I can see how this could be concerning. I'm happy to help.

I recommend using the steps below to check for debris, damage, or loose connections:

1. "Check for debris in the headphone port on your iPhone, iPad or iPod touch. 
2. Check your headphone cable, connector, remote, and earbuds for damage, like wear or breakage. 
3. Look for debris on the meshes in each earbud. To remove debris, gently brush all openings with a small, soft-bristled brush that's clean and dry. 
4. Firmly plug your headphones back in. If your iOS device has a case, remove the case to get a firm connection." 

If your headphones don't work with your iPhone, iPad, or iPod touch

If the issue persists, try a second pair of headphones. If the second pair works, contact the manufacturer of the initial pair and ask if you need a replacement. If the second pair has the same issue, contact Apple Support.

Contact Apple Support

Have a nice day!