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

30/11/2024 11:59:50

UK Postcode

SYDENHAM , LONDON , SE26 5QE

Baseline geo-coordinates

51.4254 , -0.050899

Survey type

31 days from the 1st date shown in the Evidence table below .

Assessment band

REGULAR

Assessment actual value

10.43

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

2,598 / 83.8 / 4.9 ✔

Flights above 26k feet.

434 / 14.0 / 0.8 ✔

Flights between 16k and 26k feet

192 / 6.2 / 0.4 ✔

Flights between 13k and 15k feet

52 / 1.7 / 0.1 ✔

Flights between 7k and 12k feet

298 / 9.6 / 0.6 ✔

Flights between 6k and 7k feet

174 / 5.6 / 0.3 ❌ (166)

Flights between 5k and 6k feet

697 / 22.5 / 1.3 ❌ (263)

Flights between 4k and 5k feet

610 / 19.7 / 1.2 ❌ (319)

Flights between 3k and 4k feet

116 / 3.7 / 0.2 ✔

Flights below 3k feet

25 / 0.8 / 0.0 ✔

4 or more flights per hour

261 / 8.4 ❌ (217)

9 or more flights per hour

45 / 1.5 ✔

Departures between 1.5k and 15k feet

502 / 16.2 / 1.0 ❌ (413)

Time and Sleep Analysis

For Assessment / Daily Avg. / Hourly Avg.

0 AM

4 / 0.1

1 AM

1 / 0.0

2 AM

2 / 0.1

3 AM

5 / 0.2

4 AM

17 / 0.5

5 AM

53 / 1.7

6 AM

124 / 4.0

7 AM

194 / 6.3

8 AM to 9 PM

2,088 / 67.4 / 4.8

10 PM

59 / 1.9

11 PM

11 / 0.4

Other Noise Disturbance, Vibration and Emissions factors

Time in seconds an aircraft existed in the airspace bubble

20 ✔

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

39 ✔

Minimum avg. distance in miles

0.46

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

65.0 / 26.0 / 3.4 ✔

Flight holding stack identified?

No

Altitude for all flights

11,677 ❌ (16,276)

Altitude of departures between 1.5k and 15k feet

8,177 ✔

Altitude of flights below 20k feet

6,739 ❌ (8,043)

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

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

12.80

Friday @ 20:00 - 4 time(s) in 4 weeks. Approx:7 flight events.

11.80

Friday @ 7:00 - 4 time(s) in 4 weeks. Approx:7 flight events.

11.40

Thursday @ 16:00 - 4 time(s) in 4 weeks. Approx:6 flight events.

11.30

Friday @ 11:00 - 4 time(s) in 4 weeks. Approx:7 flight events.

10.80

Friday @ 9:00 - 4 time(s) in 4 weeks. Approx:6 flight events.

9.90

Wednesday @ 12:00 - 4 time(s) in 4 weeks. Approx:6 flight events.

9.40

Thursday @ 19:00 - 4 time(s) in 4 weeks. Approx:6 flight events.