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

05/02/2025 19:29:14

UK Postcode

LINDFIELD , WEST SUSSEX , RH16 1SL

Baseline geo-coordinates

51.0165 , -0.098674

Survey type

31 days prior to: 01-Sep-2024 @00:50:56

Assessment band

FREQUENT

Assessment actual value

12.99

Assessment description

Likely to encounter both night-time and day-time noise disturbances that are caused by high volumes of planes flying at at low altitude. Also expect a visual impact too.

Band range

Lower: 12.0 --> Upper: 16.0

Volumes, Height bands, and Intensity.

For Assessment / Daily Avg. / Hourly Avg.

Count of ALL flights

2,867 / 92.5 / 5.4

Flights above 26k feet.

336 / 10.8 / 0.6

Flights between 16k and 26k feet

52 / 1.7 / 0.1

Flights between 13k and 15k feet

7 / 0.2 / 0.0

Flights between 7k and 12k feet

1,430 / 46.1 / 2.7 (544)

Flights between 6k and 7k feet

916 / 29.5 / 1.7 (149)

Flights between 5k and 6k feet

74 / 2.4 / 0.1

Flights between 4k and 5k feet

6 / 0.2 / 0.0

Flights between 3k and 4k feet

13 / 0.4 / 0.0

Flights below 3k feet

33 / 1.1 / 0.1

4 or more flights per hour

273 / 8.8 (202)

9 or more flights per hour

70 / 2.3

Departures between 1.5k and 15k feet

5 / 0.2 / 0.0

Time and Sleep Analysis

For Assessment / Daily Avg. / Hourly Avg.

Between Midnight and 1am

53 / 1.7

Between 1am and 2am

22 / 0.7

Between 2am and 3am

13 / 0.4

Between 3am and 4am

19 / 0.6

Between 4am and 5am

17 / 0.5

Between 5am and 6am

18 / 0.6

Between 6am and 7am

78 / 2.5

Between 7am and 8am

135 / 4.4

Between 8am and 9pm

2,262 / 73.0 / 5.2

Between 10pm and 11pm

107 / 3.5

Between 11pm and Midnight

119 / 3.8

Other Noise Disturbance, Vibration and Emissions factors

Avg time in seconds an aircraft remained in the airspace bubble

25

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

48 (43)

Minimum avg. distance in miles

0.49

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

76.0 / 37.0 / 4.0 (67)

Flight holding stack identified?

Yes

Altitude for all flights

10,688 (17,529)

Altitude of departures between 1.5k and 15k feet

7,324 (8,474)

Altitude of flights below 20k feet

7,234 (8,833)

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

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

14.40

Wednesdays between 13:00 and 14:00 - 4 time(s) in 4 weeks. Approx:8 flight events.

13.70

Wednesdays between 19:00 and 20:00 - 4 time(s) in 4 weeks. Approx:8 flight events.

11.50

Wednesdays between 16:00 and 17:00 - 4 time(s) in 4 weeks. Approx:6 flight events.

11.00

Saturdays between 15:00 and 16:00 - 4 time(s) in 4 weeks. Approx:6 flight events.

10.80

Wednesdays between 11:00 and 12:00 - 4 time(s) in 4 weeks. Approx:6 flight events.

10.30

Wednesdays between 8:00 and 9:00- 4 time(s) in 4 weeks. Approx:6 flight events.

10.20

Wednesdays between 14:00 and 15:00 - 4 time(s) in 4 weeks. Approx:6 flight events.

9.90

Wednesdays between 7:00 and 8:00- 4 time(s) in 4 weeks. Approx:6 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: LINDFIELD

UK Airport Count of Flights Percentage of Total
LONDON GATWICK AIRPORT244985.5
TRANSATLANTIC FLIGHT?1705.9
BRISTOL AIRPORT411.4
BIRMINGHAM INTERNATIONAL AIRPORT391.4
EDINBURGH AIRPORT381.3