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

05/07/2023 07:35:34

UK Postcode

FOREST-HILL-WEST-PZ , LONDON , SE23 3PZ

Baseline geo-coordinates

51.4414 , -0.056333

Survey type

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

Assessment band

FREQUENT

Assessment actual value

14.78

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

3,668 / 118.3 / 7.0 ❌ (3,399)

Flights above 26k feet.

540 / 17.4 / 1.0 ✔

Flights between 16k and 26k feet

185 / 6.0 / 0.4 ✔

Flights between 13k and 15k feet

81 / 2.6 / 0.2 ✔

Flights between 7k and 12k feet

89 / 2.9 / 0.2 ✔

Flights between 6k and 7k feet

40 / 1.3 / 0.1 ✔

Flights between 5k and 6k feet

285 / 9.2 / 0.5 ❌ (263)

Flights between 4k and 5k feet

1,124 / 36.3 / 2.1 ❌ (319)

Flights between 3k and 4k feet

132 / 4.3 / 0.3 ✔

Flights below 3k feet

1,192 / 38.5 / 2.3 ❌ (731)

4 or more flights per hour

360 / 11.6 ❌ (217)

9 or more flights per hour

130 / 4.2 ❌ (90)

Departures between 1.5k and 15k feet

146 / 4.7 / 0.3 ✔

Time and Sleep Analysis

For Assessment / Daily Avg. / Hourly Avg.

0 AM

17 / 0.5

1 AM

13 / 0.4

2 AM

9 / 0.3

3 AM

3 / 0.1

4 AM

17 / 0.5

5 AM

38 / 1.2

6 AM

179 / 5.8

7 AM

264 / 8.5

8 AM to 9 PM

2,961 / 95.5 / 6.8

10 PM

107 / 3.5

11 PM

40 / 1.3

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

39 ✔

Minimum avg. distance in miles

0.35

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

95.0 / 38.0 / 5.0 ❌ (77)

Flight holding stack identified?

No

Altitude for all flights

8,986 ❌ (16,276)

Altitude of departures between 1.5k and 15k feet

10,281 ✔

Altitude of flights below 20k feet

4,430 ❌ (8,043)

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

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

17.40

Tuesday @ 18:00 - 4 time(s) in 4 weeks. Approx:9 flight events.

15.00

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

14.40

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

13.40

Tuesday @ 16:00 - 4 time(s) in 4 weeks. Approx:7 flight events.

13.30

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

13.10

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

12.50

Monday @ 14:00 - 4 time(s) in 4 weeks. Approx:7 flight events.

12.20

Tuesday @ 10:00 - 4 time(s) in 4 weeks. Approx:7 flight events.