From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
Page 2 of a letter from Siemens-Schuckert (Great Britain) Ltd. describing a noise measuring instrument.
| Identifier | ExFiles\Box 138\1\ scan0218 | |
| Date | 2nd January 1936 | |
| SIEMENS-SCHUCKERT (GREAT BRITAIN) LTD. PAGE NO. 2 DATE 2/1/36 FILE NO. HI/EJB. The model illustrated in the larger photograph is of a more universal pattern intended to cover the wider range of 25 - 120 phons. This instrument measures the R M S value of noise and is intended as a general purpose instrument for laboratory and workshop use. This instrument is priced at ... ... £ 115. 0. 0. Models of these two instruments will shortly be avail- able for inspection and if you are further interested, we shall be glad to arrange a demonstration. We look forward to hearing further from you in this connection, and remain, Yours faithfully, SIEMENS-SCHUCKERT (Great Britain) Ltd. [Signature] | ||