Rolls-Royce Archives
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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).
Graph of acoustic noise meter readings comparing a Bentley 16.B.IV and a Terraplane Six at various speeds.

Identifier  ExFiles\Box 138\1\  scan0111
Date  25th June 1934
  
ACOUSTIC NOISE METER READINGS.
HR 9L
DECIBELS
80
70
60
50
40
30
BENTLEY 16.B.IV
TERRAPLANE SIX
SPEED IN TOP GEAR
M.P.H.
0
10
20
30
40
50
60
GRINDING SHOP
CAR ERECTING BAY
PNEUMATIC HOSE
CHASSIS DESIGN OFFICE
E's & H's OFFICES
HY{Tom Haldenby - Plant Engineer}'s OFFICE.
WAITING ROOM.
COUNTRY ROAD.
ELLS
25-VI-34
  
  


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