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

03/07/2023 18:33:22

UK Postcode

HONOR-OAK-EW , LONDON , SE23 1EW

Baseline geo-coordinates

51.4471 , -0.046609

Survey type

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

Assessment band

HIGH

Assessment actual value

16.76

Assessment description

Sound equates to a busy "A" road or Dual Carriageway i.e. regular traffic that will be noticeable at peak times which includes evenings and weekends. Location is on a primary flight corridor or busy flight route or in a flight holding stack area. At times there will be multiple flight occurrences within the same hour, typically between 4-15. Some of the flights will be below 7000 feet.

Band range

Lower: 16.0 --> Upper: 20.0

Volumes, Height bands, and Intensity.

For Assessment / Daily Avg. / Hourly Avg.

Count of ALL flights

3,927 / 126.7 / 7.5 ❌ (3,399)

Flights above 26k feet.

418 / 13.5 / 0.8 ✔

Flights between 16k and 26k feet

144 / 4.6 / 0.3 ✔

Flights between 13k and 15k feet

84 / 2.7 / 0.2 ✔

Flights between 7k and 12k feet

48 / 1.5 / 0.1 ✔

Flights between 6k and 7k feet

22 / 0.7 / 0.0 ✔

Flights between 5k and 6k feet

327 / 10.5 / 0.6 ❌ (263)

Flights between 4k and 5k feet

1,435 / 46.3 / 2.7 ❌ (319)

Flights between 3k and 4k feet

179 / 5.8 / 0.3 ✔

Flights below 3k feet

1,270 / 41.0 / 2.4 ❌ (731)

4 or more flights per hour

385 / 12.4 ❌ (217)

9 or more flights per hour

164 / 5.3 ❌ (90)

Departures between 1.5k and 15k feet

84 / 2.7 / 0.2 ✔

Time and Sleep Analysis

For Assessment / Daily Avg. / Hourly Avg.

0 AM

21 / 0.7

1 AM

14 / 0.5

2 AM

5 / 0.2

3 AM

4 / 0.1

4 AM

16 / 0.5

5 AM

47 / 1.5

6 AM

212 / 6.8

7 AM

280 / 9.0

8 AM to 9 PM

3,161 / 102.0 / 7.3

10 PM

107 / 3.5

11 PM

36 / 1.2

Other Noise Disturbance, Vibration and Emissions factors

Time in seconds an aircraft existed in the airspace bubble

25 ❌ (23)

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

43 ✔

Minimum avg. distance in miles

0.44

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

110.0 / 47.0 / 5.8 ❌ (77)

Flight holding stack identified?

No

Altitude for all flights

7,667 ❌ (16,276)

Altitude of departures between 1.5k and 15k feet

11,773 ✔

Altitude of flights below 20k feet

4,363 ❌ (8,043)

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

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

19.30

Sunday @ 13:00 - 4 time(s) in 4 weeks. Approx:11 flight events.

18.30

Monday @ 8:00 - 4 time(s) in 4 weeks. Approx:10 flight events.

18.00

Sunday @ 21:00 - 4 time(s) in 4 weeks. Approx:10 flight events.

17.00

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

15.80

Sunday @ 19:00 - 4 time(s) in 4 weeks. Approx:9 flight events.

15.00

Sunday @ 18:00 - 4 time(s) in 4 weeks. Approx:8 flight events.

14.60

Monday @ 7:00 - 4 time(s) in 4 weeks. Approx:8 flight events.

14.20

Monday @ 14:00 - 4 time(s) in 4 weeks. Approx:8 flight events.