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

21/07/2022 13:35:00

UK Postcode

WORMLEY-WEST-END , HERTFORDSHIRE , EN10 7QN

Baseline geo-coordinates

51.7367 , -0.064533

Survey type

31 days prior to: 11-Jul-2022 @00:47:34

Assessment band

INTERMITTENT

Assessment actual value

5.70

Assessment description

Sound equates to a "C" road or an active country lane i.e. irregular traffic volumes. Location is on a flight route as opposed to a flight corridor. Some of the flights will be below 7000 feet and could occur at evenings and weekends.

Band range

Lower: 4.0 --> Upper: 7.0

Volumes, Height bands, and Intensity.

For Assessment / Daily Avg. / Hourly Avg.

Count of ALL flights

2,396 / 77.3 / 4.5

Flights above 26k feet.

897 / 28.9 / 1.7 (755)

Flights between 16k and 26k feet

496 / 16.0 / 0.9 (350)

Flights between 13k and 15k feet

139 / 4.5 / 0.3

Flights between 7k and 12k feet

574 / 18.5 / 1.1 (547)

Flights between 6k and 7k feet

31 / 1.0 / 0.1

Flights between 5k and 6k feet

45 / 1.5 / 0.1

Flights between 4k and 5k feet

48 / 1.5 / 0.1

Flights between 3k and 4k feet

28 / 0.9 / 0.1

Flights below 3k feet

138 / 4.5 / 0.3

4 or more flights per hour

156 / 5.0

9 or more flights per hour

3 / 0.1

Departures between 1.5k and 15k feet

475 / 15.3 / 0.9 (399)

Time and Sleep Analysis

For Assessment / Daily Avg. / Hourly Avg.

Between Midnight and 1am

69 / 2.2

Between 1am and 2am

54 / 1.7

Between 2am and 3am

25 / 0.8

Between 3am and 4am

15 / 0.5

Between 4am and 5am

21 / 0.7

Between 5am and 6am

10 / 0.3

Between 6am and 7am

46 / 1.5

Between 7am and 8am

106 / 3.4

Between 8am and 9pm

1,873 / 60.4 / 4.3

Between 10pm and 11pm

79 / 2.5

Between 11pm and Midnight

70 / 2.3

Other Noise Disturbance, Vibration and Emissions factors

Avg time in seconds an aircraft remained in the airspace bubble

16

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

45 (43)

Minimum avg. distance in miles

0.48

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

25.0 / 11.0 / 1.3

Flight holding stack identified?

No

Altitude for all flights

21,398

Altitude of departures between 1.5k and 15k feet

9,833

Altitude of flights below 20k feet

9,842

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

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

6.25

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

5.88

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

5.75

Tuesdays between 9:00 and 10:00- 4 time(s) in 4 weeks. Approx:3 flight events.

4.88

Mondays between 17:00 and 18:00 - 4 time(s) in 4 weeks. Approx:3 flight events.

4.63

Wednesdays between 17:00 and 18:00 - 4 time(s) in 4 weeks. Approx:3 flight events.

4.25

Fridays between 12:00 and 13:00 - 4 time(s) in 4 weeks. Approx:3 flight events.

2.88

Sundays between 22:00 and 23:00 - 4 time(s) in 4 weeks. Approx:2 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: WORMLEY-WEST-END

UK Airport Count of Flights Percentage of Total
LONDON HEATHROW AIRPORT34014.2
MANCHESTER AIRPORT29812.4
NON UK AIRPORT29612.4
BIRMINGHAM INTERNATIONAL AIRPORT27311.4
LONDON STANSTED AIRPORT2239.3
LONDON LUTON AIRPORT1717.1
EAST MIDLANDS AIRPORT1345.6
LONDON GATWICK AIRPORT1154.8
LONDON BIGGIN HILL AIRPORT522.2
LEEDS BRADFORD AIRPORT522.2
LONDON CITY AIRPORT482.0
UNKNOWN UK AIRPORT421.8
MINOR UK AIRPORT?381.6
BRISTOL AIRPORT371.5
RAF NORTHOLT311.3
TRANSATLANTIC FLIGHT?311.3
LIVERPOOL JOHN LENNON AIRPORT281.2