研究表明,以便携音乐播放器标准音量设计的入耳式耳机会导致用户把音量调节过大而造成听力损害。两个相互独立的研究小组对不同的 MP3播放器的音量及其耳机的设计作出评估。他们的研究表明,不能很好地屏蔽外界噪声的耳机常使用户把音量调大而使他们的听觉有长期受损的危险。“这些证据表明,如果人们想要保护自己的听觉,他们必须使用高质量的耳机。”来自英国听力学会的安 Studies have shown that in-ear headphones designed at the standard volume of portable music players can cause users to over-modulate the volume and cause hearing impairment. Two independent research teams evaluated the volume of different MP3 players and the design of their headphones. Their research shows that headphones that do not properly shield outside noise often cause users to increase the volume and make their hearing long-term damage. “The evidence suggests that if people want to protect their own hearing, they must use high-quality headphones.”