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

07/05/2024 07:48:26

UK Postcode

FOREST-HILL-WEST-3HB-0823 , LONDON , SE23 3HB

Baseline geo-coordinates

51.4393 , -0.053328

Survey type

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

Assessment band

FREQUENT

Assessment actual value

12.76

Assessment description

Sound equates to an "A" road or a busy "B" road i.e. regular traffic that will be noticeable at peak times which includes evenings and weekends. Location is on a primary flight corridor or flight route or in a flight holding stack area. At times there will be multiple flight occurrences within the same hour, typically between 4-10. Some of the flights will be below 7000 feet.

Band range

Lower: 12.0 --> Upper: 16.0

Volumes, Height bands, and Intensity.

For Assessment / Daily Avg. / Hourly Avg.

Count of ALL flights

3,627 / 117.0 / 6.9 ❌ (3,399)

Flights above 26k feet.

617 / 19.9 / 1.2 ✔

Flights between 16k and 26k feet

175 / 5.6 / 0.3 ✔

Flights between 13k and 15k feet

91 / 2.9 / 0.2 ✔

Flights between 7k and 12k feet

39 / 1.3 / 0.1 ✔

Flights between 6k and 7k feet

41 / 1.3 / 0.1 ✔

Flights between 5k and 6k feet

488 / 15.7 / 0.9 ❌ (263)

Flights between 4k and 5k feet

1,582 / 51.0 / 3.0 ❌ (319)

Flights between 3k and 4k feet

166 / 5.4 / 0.3 ✔

Flights below 3k feet

428 / 13.8 / 0.8 ✔

4 or more flights per hour

389 / 12.5 ❌ (217)

9 or more flights per hour

80 / 2.6 ✔

Departures between 1.5k and 15k feet

81 / 2.6 / 0.2 ✔

Time and Sleep Analysis

For Assessment / Daily Avg. / Hourly Avg.

0 AM

18 / 0.6

1 AM

17 / 0.5

2 AM

11 / 0.4

3 AM

11 / 0.4

4 AM

19 / 0.6

5 AM

86 / 2.8

6 AM

217 / 7.0

7 AM

209 / 6.7

8 AM to 9 PM

2,794 / 90.1 / 6.4

10 PM

152 / 4.9

11 PM

59 / 1.9

Other Noise Disturbance, Vibration and Emissions factors

Time in seconds an aircraft existed in the airspace bubble

24 ❌ (23)

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

49 ❌ (43)

Minimum avg. distance in miles

0.46

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

93.0 / 45.0 / 4.9 ❌ (77)

Flight holding stack identified?

No

Altitude for all flights

10,292 ❌ (16,276)

Altitude of departures between 1.5k and 15k feet

11,650 ✔

Altitude of flights below 20k feet

5,110 ❌ (8,043)

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

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

17.30

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

15.40

Wednesday @ 20:00 - 4 time(s) in 4 weeks. Approx:8 flight events.

15.20

Friday @ 19:00 - 4 time(s) in 4 weeks. Approx:8 flight events.

14.70

Friday @ 20:00 - 4 time(s) in 4 weeks. Approx:8 flight events.

13.70

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

13.20

Wednesday @ 9:00 - 4 time(s) in 4 weeks. Approx:8 flight events.

13.10

Thursday @ 9:00 - 4 time(s) in 4 weeks. Approx:7 flight events.

12.80

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