This affordable fix may be all you need to improve earbud sound quality

Replacing the stock silicone tips on truly wireless earbuds with memory-foam alternatives creates a tighter seal that reduces sound leakage, boosts bass response, and enhances passive noise isolation, thereby improving active-noise-cancellation performance. Brands such as Comply and Sonicfoam offer compatible foam tips, though they tend to wear out after two to three months of daily use.