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The selection of a headband as the item that is not protective against excessive noise is accurate because headbands do not have any sound-blocking or sound-dampening properties. In contrast, ear plugs and ear muffs are specifically designed to reduce noise exposure and protect hearing. Ear plugs fit inside the ear canal and help to block sound from entering the ears, while ear muffs cover the ears entirely to provide a barrier against noise.

A semi-surround device can also refer to noise-canceling technology designed to minimize background noise, though its effectiveness may vary. However, it is primarily the dedicated protective gear, such as ear plugs and ear muffs, that are explicitly engineered for noise reduction.

Understanding the role of these protective items helps clarify why a headband, which is generally designed for comfort or style rather than sound protection, stands out as the only option that does not contribute to noise defense.