Kuppersberg DDL 660/990, Технический паспорт, Страница: 12 / 28

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TEchnical passporT English
Extractor hood
120 Almost unbearable
Engine room of submarine.
Jackhammer, 1 m.
100 Extremely noisy
Very noisy factory.
Subway car (intermittently).
90 Very noisy
Heavy diesel truck, 7 m.
Road drill (without muffler), 7 m.
Railway freight wagon, 7 m.
80 Very noisy
Ringing alarm clock, 1 m.
Motorcycle with a silencer, 1 m.
75 Noisy
Inside railway carriage.
Shout, 1 m.
Loud laughter, 1 m.
70 Noisy
Inside a small car, moving at a speed of 50 km/h.
Home vacuum cleaner, 3 m.
Loud conversation, 1 m.
65 Clearly audible
Typewriter.
Normal conversation, 1 m.
40 Quite audible
Institution, where there are no special sources of
noise.
35 Hardly audible
Room of a quiet apartment.
Very muffled conversation.
25 Quiet
Rural areas located far from roads.
Whisper of a person, 1 m.