Improved Ear Plugs
Page 47

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QC1ENTIFICALLY designed and highly selective ear plugs which will be ideal for commercial vehicle drivers have been introduced by Ardente Hearing Service, Wigmore Street, London, W.1. They are alled Selectones and whilst they prevent larmfulnoise reaching the ear they do lot exclude normal conversation and general road sounds such as car horns. The disadvantage of ordinary ear plugs
s that they prevent the hearing of all wise including conversation and this has ieen their greatest drawback.
Selectones are available in two types ind three sizes. Type K is the most .elective and recommended for drivers vhilst Type A is best used in only the ?ery noisiest surroundings. The sizes are arge, medium and small and the price is 5s. per pair.