UN­DER­GROUND COM­MUTERS

BBC Earth (Asia) - - Update -

Sound lev­els on some London Un­der­ground jour­neys can reach up­wards of 85 deci­bels, leav­ing pas­sen­gers at risk from po­ten­tial hear­ing loss and tin­ni­tus, re­searchers at

Univer­sity Col­lege London have found.

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