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

21/12/2021 02:08:12

UK Postcode

GREENWICH , LONDON , SE10 9PR

Baseline geo-coordinates

51.4849 , 0.003755

Survey type

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

Assessment band

FREQUENT

Assessment actual value

13.94

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

2,998 / 96.7 / 5.7 ✔

Flights above 26k feet.

421 / 13.6 / 0.8 ✔

Flights between 16k and 26k feet

92 / 3.0 / 0.2 ✔

Flights between 13k and 15k feet

30 / 1.0 / 0.1 ✔

Flights between 7k and 12k feet

18 / 0.6 / 0.0 ✔

Flights between 6k and 7k feet

213 / 6.9 / 0.4 ❌ (182)

Flights between 5k and 6k feet

1,298 / 41.9 / 2.5 ❌ (280)

Flights between 4k and 5k feet

808 / 26.1 / 1.5 ❌ (306)

Flights between 3k and 4k feet

61 / 2.0 / 0.1 ✔

Flights below 3k feet

57 / 1.8 / 0.1 ✔

4 or more flights per hour

290 / 9.4 ❌ (203)

9 or more flights per hour

92 / 3.0 ❌ (83)

Departures between 1.5k and 15k feet

7 / 0.2 / 0.0 ✔

Time and Sleep Analysis

For Assessment / Daily Avg. / Hourly Avg.

0 AM

7 / 0.2

1 AM

1 / 0.0

2 AM

5 / 0.2

3 AM

12 / 0.4

4 AM

49 / 1.6

5 AM

65 / 2.1

6 AM

206 / 6.6

7 AM

308 / 9.9

8 AM to 9 PM

2,248 / 72.5 / 5.2

10 PM

42 / 1.4

11 PM

14 / 0.5

Other Noise Disturbance, Vibration and Emissions factors

Time in seconds an aircraft existed in the airspace bubble

25 ❌ (22)

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

42 ✔

Minimum avg. distance in miles

0.46

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

80.0 / 33.0 / 4.2 ❌ (72)

Flight holding stack identified?

No

Altitude for all flights

9,938 ❌ (16,202)

Altitude of departures between 1.5k and 15k feet

9,024 ✔

Altitude of flights below 20k feet

5,581 ❌ (8,007)

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

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

6.90

Monday @ 15:00 - 4 time(s) in 4 weeks. Approx:4 flight events.

28.25

Thursday @ 7:00 - 4 time(s) in 4 weeks. Approx:15 flight events.

19.63

Wednesday @ 6:00 - 4 time(s) in 4 weeks. Approx:11 flight events.

18.88

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

18.75

Wednesday @ 18:00 - 4 time(s) in 4 weeks. Approx:10 flight events.

18.25

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

16.00

Thursday @ 10:00 - 4 time(s) in 4 weeks. Approx:9 flight events.

15.00

Wednesday @ 15:00 - 4 time(s) in 4 weeks. Approx:8 flight events.