Assessment ScoreCard – 31 Day

Assessment Scorecard headlines

All Assessments are based on an ambient background noise of between 30 and 40 dBs i.e. a quiet residential area. Typically the noise from an overflying aircraft is between 50-65 dBs. If your property is located near to a busy road i.e. 70-75 dBs, the noise impact from aircraft will be significantly reduced, whilst the road remains busy.

Note: Overflying aircraft noise typically has a duration of 30-50 seconds, the higher the plane the longer the duration. Whereas the average car, bus or HGV the duration is only a few seconds.

Date of survey

14/08/2025 07:01:45

UK Postcode Area

HEATHFIELD, EAST SUSSEX, TN21 8JD

Baseline geo-coordinates

50.9674 , 0.22458

Survey type

31 days prior to: 14-Aug-2025 @01:32:27

Assessment band

REGULAR

Assessment actual value

10.59

Assessment description

Will encounter some 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: 7.0 --> Upper: 12.0

Volumes, Height bands, and Intensity.

For Assessment / Daily Avg. / Hourly Avg.

Count of ALL flights

3,700 / 119.4 / 7.0 ❌ (3,182)

Flights above 26k feet.

169 / 5.5 / 0.3 ✔

Flights between 16k and 26k feet

474 / 15.3 / 0.9 ❌ (355)

Flights between 13k and 15k feet

172 / 5.5 / 0.3 ✔

Flights between 7k and 12k feet

2,604 / 84.0 / 4.9 ❌ (549)

Flights between 6k and 7k feet

223 / 7.2 / 0.4 ❌ (157)

Flights between 5k and 6k feet

19 / 0.6 / 0.0 ✔

Flights between 4k and 5k feet

0 ✔

Flights between 3k and 4k feet

0 ✔

Flights below 3k feet

39 / 1.3 / 0.1 ✔

4 or more flights per hour

392 / 12.6 ❌ (204)

9 or more flights per hour

134 / 4.3 ❌ (77)

Departures between 1.5k and 15k feet

3 / 0.1 / 0.0 ✔

Time and Sleep Analysis

For Assessment / Daily Avg. / Hourly Avg.

Between Midnight and 1am

91 / 2.9

Between 1am and 2am

41 / 1.3

Between 2am and 3am

18 / 0.6

Between 3am and 4am

10 / 0.3

Between 4am and 5am

6 / 0.2

Between 5am and 6am

25 / 0.8

Between 6am and 7am

63 / 2.0

Between 7am and 8am

136 / 4.4

Between 8am and 9pm

2,918 / 94.1 / 6.7

Between 10pm and 11pm

176 / 5.7

Between 11pm and Midnight

213 / 6.9

Other Noise Disturbance, Vibration and Emissions factors

Avg time in seconds an aircraft remained in the airspace bubble

34 ❌ (30)

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

47 ❌ (43)

Minimum avg. distance in miles

0.45

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

97.0 / 45.0 / 5.1 ❌ (67)

Flight holding stack identified?

Yes ❌

Altitude for all flights

12,078 ❌ (17,668)

Altitude of departures between 1.5k and 15k feet

2,120 ❌ (8,443)

Altitude of flights below 20k feet

9,741 ✔

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

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

21.90

Tuesdays between 13:00 and 14:00 - 4 time(s) in 4 weeks. Approx:16 flight events.

19.30

Mondays between 12:00 and 13:00 - 4 time(s) in 4 weeks. Approx:14 flight events.

16.60

Mondays between 13:00 and 14:00 - 4 time(s) in 4 weeks. Approx:12 flight events.

13.40

Wednesdays between 14:00 and 15:00 - 4 time(s) in 4 weeks. Approx:9 flight events.

12.40

Mondays between 14:00 and 15:00 - 4 time(s) in 4 weeks. Approx:9 flight events.

12.30

Tuesdays between 14:00 and 15:00 - 4 time(s) in 4 weeks. Approx:9 flight events.

11.50

Tuesdays between 12:00 and 13:00 - 4 time(s) in 4 weeks. Approx:8 flight events.

11.10

Mondays between 8:00 and 9:00- 4 time(s) in 4 weeks. Approx:7 flight events.

10.10

Tuesdays between 19:00 and 20:00 - 4 time(s) in 4 weeks. Approx:6 flight events.