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Mr. Spearing
asked the Secretary of State for Trade and Industry what is the maximum noise level permitted from aircraft taking off in an easterly direction from London Airport; and what, in not less than four groupings, was the distribution of noise levels for the 536 infringements recorded in August, 1970.
Mr. Anthony Grant
The maximum permitted noise levels are 110 PNdB by day and 102 PNdB by night. Revised figures for August show 539 infringements which break down between noise levels as follows:—
| Day: | |
| 111–112 PNdB | 61 |
| 113–116 PNdB | 283 |
| Over 116 PNdB | 168 |
| Night: | |
| 103–104 PNdB | 7 |
| 105–108 PNdB | 10 |
| Over 108 PNdB | 10 |
| Total | 539 |