Assessment ScoreCard – 31 Day

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

01/03/2025 17:49:25

UK Postcode

SHORTLANDS-BROMLEY , LONDON , BR3 5TL

Baseline geo-coordinates

51.4082 , -0.009196

Survey type

31 days prior to: 31-Aug-2024 @23:46:03

Assessment band

HIGH

Assessment actual value

18.08

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

5,818 / 187.7 / 11.0 ❌ (3,156)

Flights above 26k feet.

732 / 23.6 / 1.4 ✔

Flights between 16k and 26k feet

177 / 5.7 / 0.3 ✔

Flights between 13k and 15k feet

97 / 3.1 / 0.2 ✔

Flights between 7k and 12k feet

545 / 17.6 / 1.0 ❌ (539)

Flights between 6k and 7k feet

1,093 / 35.3 / 2.1 ❌ (148)

Flights between 5k and 6k feet

2,431 / 78.4 / 4.6 ❌ (212)

Flights between 4k and 5k feet

668 / 21.5 / 1.3 ❌ (235)

Flights between 3k and 4k feet

20 / 0.6 / 0.0 ✔

Flights below 3k feet

55 / 1.8 / 0.1 ✔

4 or more flights per hour

526 / 17.0 ❌ (201)

9 or more flights per hour

292 / 9.4 ❌ (75)

Departures between 1.5k and 15k feet

379 / 12.2 / 0.7 ✔

Time and Sleep Analysis

For Assessment / Daily Avg. / Hourly Avg.

Between Midnight and 1am

39 / 1.3

Between 1am and 2am

26 / 0.8

Between 2am and 3am

15 / 0.5

Between 3am and 4am

11 / 0.4

Between 4am and 5am

52 / 1.7

Between 5am and 6am

110 / 3.5

Between 6am and 7am

274 / 8.8

Between 7am and 8am

310 / 10.0

Between 8am and 9pm

4,618 / 149.0 / 10.6

Between 10pm and 11pm

230 / 7.4

Between 11pm and Midnight

82 / 2.6

Other Noise Disturbance, Vibration and Emissions factors

Avg time in seconds an aircraft remained in the airspace bubble

52 ❌ (31)

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

49 ❌ (43)

Minimum avg. distance in miles

0.49

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

161.0 / 79.0 / 8.5 ❌ (67)

Flight holding stack identified?

Yes ❌

Altitude for all flights

10,138 ❌ (17,559)

Altitude of departures between 1.5k and 15k feet

9,039 ✔

Altitude of flights below 20k feet

6,469 ❌ (8,838)

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

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

23.40

Saturdays between 8:00 and 9:00- 4 time(s) in 4 weeks. Approx:13 flight events.

22.80

Thursdays between 8:00 and 9:00- 4 time(s) in 4 weeks. Approx:13 flight events.

21.50

Fridays between 20:00 and 21:00 - 4 time(s) in 4 weeks. Approx:12 flight events.

20.80

Fridays between 19:00 and 20:00 - 4 time(s) in 4 weeks. Approx:11 flight events.

19.80

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

19.50

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

19.10

Fridays between 12:00 and 13:00 - 4 time(s) in 4 weeks. Approx:10 flight events.

19.00

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

18.90

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