I agree with the last post. Noise cancelling headphones are good for travelling but not fireworks. The best earplugs to get are those bikers use, and you can get them custom made to fit your own ears. Expensive but you'll never need another. Try this place ultimate ear | Ear Plugs | Hearing and Ear Protection London UK. You can also get ones to put on top of normal earbuds to give extra protection. Good luck!