§ Mr. Sandelsonasked the Secretary of State for Trade if he will now publish the results of noise monitoring undertaken during Concorde's endurance flying programme from Heathrow; and if he will make a statement.
§ Mr. ShoreNoise measurements were taken at Heathrow's 13 fixed monitoring sites and at 17 additional sites, using mobile equipment, the locations of which were selected after consultation with local environmental groups, and in the light of interests expressed by hon. Members. The maximum take-off readings recorded at the fixed points, and the 625W maximum take-off and landing readings at the mobile points, are shown below together with all the locations. For case of reference, a map showing these locations has been placed in the Library.
The noise levels are expressed in PNdB (perceived noise decibels), the normal unit of measurement used at Heathrow. Earlier published figures for Concorde noise have been in EPNdB (effective perceived noise decibels), the unit commonly used internationally for measurement and comparison of aircraft noise. The EPNdB scale makes adjustments for dominant pure tones, such as fan whine, and for the duration of the noise, factors which substantially affect
CONCORDE ENDURANCE FLYING PROGRAMME NOISE MONITORING RESULTS FOR ARRIVALS AT HEATHROW Runway (see footnote 1) Noise at Mobile Monitoring Sites (see footnote 2) Date Time Site No. PNdB Site No. PNdB Site No. PNdB 7th July 1975 … 22.15 10L 16 86 17 89 14 111 8th July 1975 … 19.22 28L — — — — — — 9th July 1975 … 15.45 28L 21 93 23 109 24 110 12th July 1975 … 12.57 28R 21 108 24 92 — — 22nd August 1975 … 16.38 28L 21 89 23 106 — — 24th August 1975 … 15.33 28L 21 93 24 111 23 104 24th August 1975 … 21.56 28L 22 87 23 102 24 110 25th August 1975 … 16.07 28R 24 92 22 105 — — 25th August 1975 … 22.02 28R 21 113 22 101 — — 26th August 1975 … 15.24 28L 21 95 24 113 23 101 27th August 1975 … 17.00 10L 17 90 14 107 15 101 27th August 1975 … 22.25 10R — — — — — — 28th August 1975 … 13.21 10L 17 88 14 110 15 102 28th August 1975 … 19.56 10L 17 90 14 110 15 100 29th August 1975 … 08.30 28L — — — — — — 30th August 1975 … 20.59 28L — — — — — — 31st August 1975 … 15.59 10L — — — — — — 31st August 1975 … 22.18 28L — — — — — — 1st September 1975 … 13.48 28L 24 106 23 103 22 89 1st September 1975 … 21.52 28L — — — — — — 2nd September 1975 … 16.46 28L 24 109 21 91 22 85 2nd September 1975 … 22.51 28L — — — — — — 3rd September 1975 … 13.16 28L 24 106 23 103 22 89 3rd September 1975 … 19.53 28L 24 108 23 104 — — 4th September 1975 … 13.40 28L 24 109 23 104 22 92 4th September 1975 … 18.36 28L — — — — — — 5th September 1975 … 16.44 28L 23 106 24 109 — — 5th September 1975 … 22.44 28L — — — — — — 6th September 1975 … 13.23 28L — — — — — — 6th September 1975 … 21.51 28L — — — — — — 7th September 1975 … 14.05 28L 24 111 — — — — 7th September 1975 … 22.24 28L 24 108 23 102 — — 9th September 1975 … 18.24 28R 21 111 22 102 — — 10th September 1975 … 21.46 28R 21 109 22 105 — — 11th September 1975 … 16.01 28R 24 85 21 109 — — 11th September 1975 … 22.07 28L 24 107 23 105 — — 12th September 1975 … 16.40 28R 24 87 23 92 21 109 12th September 1975 … 22.47 28R 24 90 — — — — 13th September 1975 … 16.10 10L — — — — — — 13th September 1975 … 21.47 10L — — — — — — Footnotes:
1. 28R is the northern runway when used in an east to west direction.
28L is the southern runway when used in an east to west direction.
10R is the southern runway when used in a west to east direction.
10L is the northern runway when used in a west to east direction.
2. Readings not available for every landing.
626Windividual reactions to aircraft noise. In the case of Concorde, noise measurements are lower when expressed in EPNdB.
There were variations in noise between individual flights, caused by a number of operating factors including differences in procedures.
The results are fully consistent with noise measurements made earlier at Casablanca, in accordance with the International Civil Aviation Organisation techniques contained in Annex 16 of the Chicago Convention.
These figures will in due course be published by my right hon. Friend the Secretary of State for Industry.
627W
CONCORDE ENDURANCE FLYING PROGRAMME NOISE MONITORING RESULTS FOR DEPARTURES LONDON HEATHROW Date Time Runway (see footnote 1) Maximum Noise at Fixed Monitoring Site Noise at Mobile Monitoring Sites (see footnote 2) Site No. PNdB Site No. PNdB Site No. PNdB Site No. PNdB 7th July 1975 12.46 10R 1 112* 26 107 25 109 27 109 8th July 1975 15.22 10R 3 120* 26 118. 25 106 27 108 9th July 1975 12.45 28L 11 111 19 95 18 108 — — 11th July 1975 10.18 28L 7 105 18 92 — — — — 12th July 1975 15.04 28L 7 107 18 101 19 86 — — 24th August 1975 09.21 28L 11 113 19 95 18 108 — — 24th August 1975 18.24 28R 12 118 19 92 — — — — 25th August 1975 09.30 28R 12 112 19 86 18 104 — — 25th August 1975 18.36 28L 11 111 18 107 19 95 — — 26th August 1975 09.18 28L 10 and 11 108 19 93 18 109 — — 27th August 1975 08.16 28L 7 104 — — — — — — 27th August 1975 19.21 10R 3 120 — — — — — — 28th August 1975 07.21 28L 11 108 — — — — — — 28th August 1975 16.26 10R 4 121 26 100 25 116 — — 29th August 1975 07.25 28R 12 114 — — — — — — 30th August 1975 17.29 28R 12 120 — — — — — — 31st August 1975 09.51 10R 2 and 3 114 — — — — — — 31st August 1975 18.49 28R 12 125 — — — — — — 1st September 1975 07.55 28L 11 111 — — — — — — 1st September 1975 16.02 28L 11 109 18 105 30 101 — — 2nd September 1975 10.39 28R 12 120 18 102 30 101 — — 2nd September 1975 19.26 28R 12 119 — — — — — — 3rd September 1975 07.27 28L 10 103 — — — — — — 3rd September 1975 16.23 28R 13 110 17 112 30 105 — — 4th September 1975 07.43 28L 11 107 — — — — — — 4th September 1975 16.03 28R 12 113 17 105 30 99 — — 5th September 1975 10.31 28L 10 and 11 107 14 95 30 101 — — 5th September 1975 19.14 28L 11 114 — — — — — — 6th September 1975 07.18 28R 12 112 — — — — — — 6th September 1975 15.45 28L 11 114 — — — — — — 7th September 1975 08.20 28R 12 112 — — — — — — 7th September 1975 16.27 28L 11 109 30 97 — — — — 9th September 1975 10.05 28R 12 112 17 103 19 94 — — 10th September 1975 10.51 28R 12 111 28 96 30 100 — — 11th September 1975 08.21 28R 12 111 17 106 30 104 — — 11th September 1975 18.37 28R Equipment undergoing maintenance l7 104 30 104 — — 12th September 1975 09.05 28R 17 94 — — — — 12th September 1975 19.16 28L 17 112 — — — — 13th September 1975 08.42 28R 12 111 17 109 — — — — 13th September 1975 18.38 10R 2 and 4 120 — — — — — — * Points 4 and 5 not operative. † Point 11 not operative. Footnotes:
1. 28R is the northern runway when used in an east to west direction.
28L is the southern runway when used in an east to west direction.
10R is the southern runway when used in a west to east direction.
2. Reading not available for every take off.
628W629W
LOCATION OF MONITORING SITES Site No. Fixed Microphones 1 Waye Avenue, Cranford. 2 Beaver Lane, Hounslow. 3 Wellington Road South, Hounslow. 4 Wyndham Crescent, Hounslow. 5 Feltham. 6 South West Middlesex Crematorium. 7 Long Lane Recreation Gound, Stanwell. 8 Waterboard River, Staines. 9 Hythe End Lane, Wraysbury 10 The Green, Wraysbury. 11 Sunnymeads, Wraysbury 12 Horton Green. 13 Colnbrook. Mobile Microphones 14 Southlea, Datchet Common. 15 Oakley Green. 16 Windsor Forest—approximately 2½ miles south-east of Windsor. 17 Manor Farm, Old Windsor. 18 Cornwell Road, Old Windsor. 19 St. Johns College, near Runnymede. 21 Old Isleworthians Sports Ground, Springrove. 22 Dukes Meadows, Chiswick. 23 Lewin Road, Mortlake. 24 Mogden Sewage Works, Isleworth. 25 Twickenham Technical College Playing Field. 26 Lincoln Avenue, Twickenham. 27 Esher Park Avenue, Esher. 28 Ham Fields, near Sunnymeads. 30 Maidens Green, near Winkfield.