The CT-NoiseProtection helmet is from CeoTronics and is the communications product of choice for extreme noise conditions of up to 140 db (A). The in-built communications system, enables voice to be picked up despite major structure-borne sound artefacts. The special helmet has an outstanding sound insulation value of SNR 42 db and is certified as personal protective equipment (PPE). Visit www.ceotronics.com for more information.