Stricter legislation might reduce noise levels in the workplace.[24] Hearing protection devices, such as earmuffs and earplugs can reduce noise exposure to safe levels, but, instructions are needed on how to put plugs into the ears correctly to achieve potential attenuation. Giving workers information on their noise exposure levels by itself was not shown to decrease noise. Engineering solutions might lead to similar noise reduction as that provided by hearing protection, but better evaluation of the noise exposures resulting from engineering interventions is needed, as most of the available information is limited to observations in laboratory conditions.