Assessment ScoreCard – 31 Day

Aircraft Traffic Assessment: 31 Day Scorecard



The symbol indicates the measure is better than the average when compared with other assessed
UK postcodes. The ❌ represents the opposite. Assessed averages are shown in brackets.

See: for a full explanation about the Assessment scorecard.

Assessment Scorecard headlines

All Assessments are based on an ambient background noise of 40 decibels i.e. a quiet residential area. If your property is located near to a busy road i.e. 70-75 decibels, the noise impact from aircraft will be significantly reduced, whilst the road remains busy.

Note: Airborne aircraft noise is typically in the range of 45dB - 65dB for heights below 26,000 feet and for a duration of 30-50 seconds. Whereas the average car, bus or HGV the duration is only a few seconds.

Date of survey

21/02/2022 09:24:02

UK Postcode

ST-JOHNS-WOOD-ABBEY-ROAD , LONDON , NW8 9DY

Baseline geo-coordinates

51.5326 , -0.180857

Survey type

31 days prior to: 21-Feb-2022 @07:56:43

Assessment band

MINIMAL

Assessment actual value

3.52

Assessment description

Sound equates to a quiet country lane i.e. irregular and low volume traffic. However, occasionally some of the flights could be below 7000 feet and could occur at evenings and weekends.

Band range

Lower: 0.0 --> Upper: 4.0

Volumes, Height bands, and Intensity.

For Assessment / Daily Avg. / Hourly Avg.

Count of ALL flights

739 / 23.8 / 1.4

Flights above 26k feet.

389 / 12.5 / 0.7

Flights between 16k and 26k feet

132 / 4.3 / 0.3

Flights between 13k and 15k feet

112 / 3.6 / 0.2

Flights between 7k and 12k feet

48 / 1.5 / 0.1

Flights between 6k and 7k feet

10 / 0.3 / 0.0

Flights between 5k and 6k feet

7 / 0.2 / 0.0

Flights between 4k and 5k feet

13 / 0.4 / 0.0

Flights between 3k and 4k feet

13 / 0.4 / 0.0

Flights below 3k feet

15 / 0.5 / 0.0

4 or more flights per hour

4 / 0.1

9 or more flights per hour

0 / 0.0

Departures between 1.5k and 15k feet

12 / 0.4 / 0.0

Time and Sleep Analysis

For Assessment / Daily Avg. / Hourly Avg.

Between Midnight and 1am

10 / 0.3

Between 1am and 2am

9 / 0.3

Between 2am and 3am

8 / 0.3

Between 3am and 4am

5 / 0.2

Between 4am and 5am

8 / 0.3

Between 5am and 6am

16 / 0.5

Between 6am and 7am

24 / 0.8

Between 7am and 8am

43 / 1.4

Between 8am and 9pm

562 / 18.1 / 1.3

Between 10pm and 11pm

16 / 0.5

Between 11pm and Midnight

12 / 0.4

Other Noise Disturbance, Vibration and Emissions factors

Avg time in seconds an aircraft remained in the airspace bubble

14

Percentage of overflying occuring Out-Of-Hours and at Weekends

36

Minimum avg. distance in miles

0.50

Number of possible disruptions by; day / out-of-hours / hour

3.0 / 1.0 / 0.2

Flight holding stack identified?

No

Altitude for all flights

24,857

Altitude of departures between 1.5k and 15k feet

7,147 (8,466)

Altitude of flights below 20k feet

12,952

Busiest times of day
(Distruption: 0 - low, 25+ high)

Day of week, time, frequency and number of flight events.

3.00

Tuesdays between 13:00 and 14:00 - 2 time(s) in 4 weeks. Approx:2 flight events.

2.75

Sundays between 13:00 and 14:00 - 2 time(s) in 4 weeks. Approx:3 flight events.

7.00

Sundays between 19:00 and 20:00 - 1 time(s) in 4 weeks. Approx:4 flight events.

6.50

Mondays between 17:00 and 18:00 - 1 time(s) in 4 weeks. Approx:4 flight events.

4.00

Fridays between 16:00 and 17:00 - 1 time(s) in 4 weeks. Approx:2 flight events.

3.50

Fridays between 7:00 and 8:00- 1 time(s) in 4 weeks. Approx:3 flight events.

Our scorecard is designed to provide a greater understanding how the assessment was reached for your selected UK post code. To enable you to validate our assessment we also provide up to 10 occurrences when we believe the disruption will be at its highest.

For those that would like to perform their own analysis we can also provide the low level flight data that includes the length of time a plane existed inside your select airspace bubble.



Evidence by associated Airport – indicative only: ST-JOHNS-WOOD-ABBEY-ROAD

UK Airport Count of Flights Percentage of Total
NON UK AIRPORT26736.3
LONDON STANSTED AIRPORT587.9
BIRMINGHAM INTERNATIONAL AIRPORT547.3
FARNBOROUGH AIRPORT527.1
LONDON HEATHROW AIRPORT496.7
BRISTOL AIRPORT476.4
LONDON LUTON AIRPORT466.3
LONDON GATWICK AIRPORT415.6
MANCHESTER AIRPORT243.3
EAST MIDLANDS AIRPORT202.7
TRANSATLANTIC FLIGHT?91.2
LONDON BIGGIN HILL AIRPORT91.2