A recent study has found that constant exposure to noise at work, together with hearing loss, can cause sleep problems.
The study compared the sleep of people in the same workplace, some with hearing loss and some without.
One difference between the groups was that those with hearing loss were usually older and had spent longer in the noisy workplace. Among people with hearing loss, 51% had tinnitus (ringing in the ears), compared with only 14% of those with normal hearing.
Tinnitus was one of the factors linked to poor sleep, and noise-induced hearing damage was linked to poor sleep regardless of age or years of exposure to noise, especially in people with severe insomnia.
Studying people in a single workplace means many factors are shared, so the main difference is whether they have hearing problems.
Sleep problems included difficulty falling asleep, not sleeping until late, waking too early or waking several times a night, as well as excessive sleepiness and poor concentration during the day and restless movement during sleep.
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