These earplugs were best tested by external parties. These are parties such as the Consumentenbond, EISA, and What Hi-Fi. You can find different types here, such as wired, wireless, and fully wireless earbuds. The product always states which award it has received. For example, What Hi-Fi awards a 4 or 5 star award and a product at EISA is voted the best product in its product class. Because these parties are independent, you can be sure that the product has been tested objectively.