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

25/11/2025 16:29:02

UK Postcode Area

CLOCK-HOUSE-BECKENHAM-0825, LONDON, BR3 4NY

Baseline geo-coordinates

51.4057 , -0.047898

Survey type

31 days prior to: 01-Sep-2025 @23:55:42

Assessment band

HIGH

Assessment actual value

17.22

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: 16.0 --> Upper: 20.0

Volumes, Height bands, and Intensity.

For Assessment / Daily Avg. / Hourly Avg.

Count of ALL flights

5,884 / 189.8 / 11.2 ❌ (3,204)

Flights above 26k feet.

944 / 30.5 / 1.8 ❌ (760)

Flights between 16k and 26k feet

307 / 9.9 / 0.6 ✔

Flights between 13k and 15k feet

64 / 2.1 / 0.1 ✔

Flights between 7k and 12k feet

1,002 / 32.3 / 1.9 ❌ (577)

Flights between 6k and 7k feet

1,112 / 35.9 / 2.1 ❌ (172)

Flights between 5k and 6k feet

1,941 / 62.6 / 3.7 ❌ (231)

Flights between 4k and 5k feet

446 / 14.4 / 0.8 ❌ (252)

Flights between 3k and 4k feet

21 / 0.7 / 0.0 ✔

Flights below 3k feet

47 / 1.5 / 0.1 ✔

4 or more flights per hour

521 / 16.8 ❌ (209)

9 or more flights per hour

280 / 9.0 ❌ (78)

Departures between 1.5k and 15k feet

1,214 / 39.2 / 2.3 ❌ (402)

Time and Sleep Analysis

For Assessment / Daily Avg. / Hourly Avg.

Between Midnight and 1am

33 / 1.1

Between 1am and 2am

19 / 0.6

Between 2am and 3am

12 / 0.4

Between 3am and 4am

10 / 0.3

Between 4am and 5am

22 / 0.7

Between 5am and 6am

59 / 1.9

Between 6am and 7am

225 / 7.3

Between 7am and 8am

307 / 9.9

Between 8am and 9pm

4,729 / 152.5 / 10.9

Between 10pm and 11pm

317 / 10.2

Between 11pm and Midnight

116 / 3.7

Other Noise Disturbance, Vibration and Emissions factors

Avg time in seconds an aircraft remained in the airspace bubble

22 ✔

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

52 ❌ (44)

Minimum avg. distance in miles

0.51

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

154.0 / 82.0 / 8.1 ❌ (68)

Flight holding stack identified?

No

Altitude for all flights

11,485 ❌ (17,563)

Altitude of departures between 1.5k and 15k feet

8,235 ❌ (8,519)

Altitude of flights below 20k feet

6,959 ❌ (8,791)

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

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

23.00

Mondays between 19:00 and 20:00 - 4 time(s) in 4 weeks. Approx:13 flight events.

22.60

Sundays between 19:00 and 20:00 - 4 time(s) in 4 weeks. Approx:13 flight events.

22.50

Fridays between 19:00 and 20:00 - 4 time(s) in 4 weeks. Approx:13 flight events.

22.30

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

21.80

Fridays between 15:00 and 16:00 - 4 time(s) in 4 weeks. Approx:12 flight events.

20.50

Fridays between 8:00 and 9:00- 4 time(s) in 4 weeks. Approx:11 flight events.

20.10

Mondays between 21:00 and 22:00 - 4 time(s) in 4 weeks. Approx:11 flight events.

19.70

Fridays between 21:00 and 22:00 - 4 time(s) in 4 weeks. Approx:11 flight events.

19.10

Saturdays between 12:00 and 13:00 - 4 time(s) in 4 weeks. Approx:11 flight events.