it depends on what kind
To purchase some new and cheap ear buds you can search on amazon.com. They sell almost everything and offer a huge variety on ear buds. You can also compare new and used offers on the site.
Some of the ear buds tat you can buy at $20 at a Walmart or store are Beats by Dr. Dre, Apple ear buds, and Ergonomic ear buds.
Yes, there are American made ear buds. The only American company that makes ear buds is called Westone, and they are located in Colorado.
Yes
styrofome will do the trick
Yes, they will.
yes he did
Nathaniel Baldwin in 1910.
If you are looking for the best sound, I would check out the Sony sound ear buds since they offer high quality sound.
Ear parts are very delicate and more so in children. Sometime ear buds can puncture the ear drum or damage it mildly while scraping wax from the canal. This causes severe ear pain in children. Even though ruptured eardrum heals by self, it might take months to heal. Hence it is best to avoid buds in children.
Good materials that are used in soundproof ear muffs include polyvinyl chloride and polyurethane. If ear plugs are desired the best options are moldable wax or silicone.