A Hacker News discussion explores a study suggesting that audio compression, as a music production technique, might be harmful to ears, not data compression. The study blasted guinea pigs with compressed and uncompressed music, finding the compressed variant caused longer-lasting temporary damage at the same loudness levels. Commenters clarify "compression" refers to reducing dynamic range, making quieter sounds louder, common in pop music and radio to sound better on low-quality speakers and in noisy environments (like cars). This is also referred to as the "Loudness War". While some argue this increases overall acoustic energy delivered to the ear, others suspect improperly used compression can exaggerate audio peaks if not properly limited. Some users express concern about noise-canceling headphones creating pressure.