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).
Reporting dissatisfaction with the performance of a Two-Note Klaxon Horn.
| Identifier | ExFiles\Box 18\3\ Scan194 | |
| Date | 21th November 1930 | |
| X7980 To Hdy.{William Hardy} from Sg.{Arthur F. Sidgreaves - MD} Sg{Arthur F. Sidgreaves - MD}8/D21.11.30. X11636, Re: Two-Note Klaxon Horn. I have tried this and am sorry to say that it is not satisfactory. The low tone is too low to be of use, and the high tone is, to my mind, too much like the note of the horns one hears on the average American car. Additionally, its penetrative powers are insufficient for fast country use. I have asked Crawford to have it taken off the car. Sg.{Arthur F. Sidgreaves - MD} | ||