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

19/09/2025 18:06:21

UK Postcode Area

ALEXANDRA-PARK-0625, LONDON, N22 7AE

Baseline geo-coordinates

51.6006 , -0.12905

Survey type

31 days prior to: 01-Jul-2025 @23:37:25

Assessment band

HIGH

Assessment actual value

16.75

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

5,476 / 176.6 / 10.4 ❌ (3,187)

Flights above 26k feet.

1,203 / 38.8 / 2.3 ❌ (763)

Flights between 16k and 26k feet

333 / 10.7 / 0.6 ✔

Flights between 13k and 15k feet

157 / 5.1 / 0.3 ✔

Flights between 7k and 12k feet

1,117 / 36.0 / 2.1 ❌ (551)

Flights between 6k and 7k feet

1,710 / 55.2 / 3.2 ❌ (163)

Flights between 5k and 6k feet

791 / 25.5 / 1.5 ❌ (226)

Flights between 4k and 5k feet

64 / 2.1 / 0.1 ✔

Flights between 3k and 4k feet

14 / 0.5 / 0.0 ✔

Flights below 3k feet

87 / 2.8 / 0.2 ✔

4 or more flights per hour

438 / 14.1 ❌ (204)

9 or more flights per hour

222 / 7.2 ❌ (77)

Departures between 1.5k and 15k feet

59 / 1.9 / 0.1 ✔

Time and Sleep Analysis

For Assessment / Daily Avg. / Hourly Avg.

Between Midnight and 1am

29 / 0.9

Between 1am and 2am

19 / 0.6

Between 2am and 3am

13 / 0.4

Between 3am and 4am

9 / 0.3

Between 4am and 5am

10 / 0.3

Between 5am and 6am

58 / 1.9

Between 6am and 7am

341 / 11.0

Between 7am and 8am

294 / 9.5

Between 8am and 9pm

4,488 / 144.8 / 10.3

Between 10pm and 11pm

114 / 3.7

Between 11pm and Midnight

60 / 1.9

Other Noise Disturbance, Vibration and Emissions factors

Avg time in seconds an aircraft remained in the airspace bubble

19 ✔

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

47 ❌ (43)

Minimum avg. distance in miles

0.49

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

128.0 / 60.0 / 6.7 ❌ (67)

Flight holding stack identified?

No

Altitude for all flights

13,755 ❌ (17,684)

Altitude of departures between 1.5k and 15k feet

6,656 ❌ (8,443)

Altitude of flights below 20k feet

7,155 ❌ (8,796)

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

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

23.30

Tuesdays between 10:00 and 11:00 - 4 time(s) in 4 weeks. Approx:13 flight events.

22.90

Tuesdays between 9:00 and 10:00- 4 time(s) in 4 weeks. Approx:13 flight events.

20.90

Sundays between 6:00 and 7:00- 4 time(s) in 4 weeks. Approx:12 flight events.

20.80

Saturdays between 10:00 and 11:00 - 4 time(s) in 4 weeks. Approx:12 flight events.

20.70

Tuesdays between 15:00 and 16:00 - 4 time(s) in 4 weeks. Approx:11 flight events.

19.90

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

19.80

Tuesdays between 6:00 and 7:00- 4 time(s) in 4 weeks. Approx:11 flight events.

19.30

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