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 15:52:40

UK Postcode Area

CLOCK-HOUSE-BECKENHAM, LONDON, BR3 4NY

Baseline geo-coordinates

51.4057 , -0.047898

Survey type

31 days prior to: 25-Nov-2025 @00:49:07

Assessment band

FREQUENT

Assessment actual value

15.49

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

4,595 / 148.2 / 8.7 ❌ (3,204)

Flights above 26k feet.

611 / 19.7 / 1.2 ✔

Flights between 16k and 26k feet

258 / 8.3 / 0.5 ✔

Flights between 13k and 15k feet

98 / 3.2 / 0.2 ✔

Flights between 7k and 12k feet

859 / 27.7 / 1.6 ❌ (577)

Flights between 6k and 7k feet

1,343 / 43.3 / 2.5 ❌ (172)

Flights between 5k and 6k feet

1,080 / 34.8 / 2.0 ❌ (231)

Flights between 4k and 5k feet

303 / 9.8 / 0.6 ❌ (252)

Flights between 3k and 4k feet

7 / 0.2 / 0.0 ✔

Flights below 3k feet

36 / 1.2 / 0.1 ✔

4 or more flights per hour

451 / 14.5 ❌ (209)

9 or more flights per hour

190 / 6.1 ❌ (78)

Departures between 1.5k and 15k feet

708 / 22.8 / 1.3 ❌ (402)

Time and Sleep Analysis

For Assessment / Daily Avg. / Hourly Avg.

Between Midnight and 1am

12 / 0.4

Between 1am and 2am

5 / 0.2

Between 2am and 3am

4 / 0.1

Between 3am and 4am

5 / 0.2

Between 4am and 5am

41 / 1.3

Between 5am and 6am

45 / 1.5

Between 6am and 7am

181 / 5.8

Between 7am and 8am

309 / 10.0

Between 8am and 9pm

3,779 / 121.9 / 8.7

Between 10pm and 11pm

160 / 5.2

Between 11pm and Midnight

23 / 0.7

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

50 ❌ (44)

Minimum avg. distance in miles

0.53

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

125.0 / 63.0 / 6.6 ❌ (68)

Flight holding stack identified?

No

Altitude for all flights

10,996 ❌ (17,563)

Altitude of departures between 1.5k and 15k feet

8,938 ✔

Altitude of flights below 20k feet

7,264 ❌ (8,791)

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

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

17.50

Mondays between 19:00 and 20:00 - 4 time(s) in 4 weeks. Approx:10 flight events.

17.00

Sundays between 13:00 and 14:00 - 4 time(s) in 4 weeks. Approx:10 flight events.

16.90

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

16.70

Mondays between 12:00 and 13:00 - 4 time(s) in 4 weeks. Approx:9 flight events.

16.50

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

15.80

Mondays between 10:00 and 11:00 - 4 time(s) in 4 weeks. Approx:9 flight events.

15.70

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

15.60

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