Yes, they have been tested in accordance with ISO BS EN352-2 by Salford University School of Acoustics and 3rd party verified against the ISO standard by Inspec Accreditation Services.
Additionally, Swinden Technology Laboratories the technical department of Corus UK Ltd ran a real-world trial on the Corus Scunthorpe site which resulted in ProtectHear being approved for use by Corus UK.
The Blue food grade ProtectHear was developed in conjunction with and is approved by Masterfoods, Slough (Mars)
The blue ProtectHear with a special white cord and a plastic packing tub has also been approved by Imperial Tobacco’s Additives Guidance Panel as being toxicologically inert. |