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

23/12/2021 23:32:52

UK Postcode

STROUD-GREEN , LONDON , N4 4QT

Baseline geo-coordinates

51.5771 , -0.107945

Survey type

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

Assessment band

FREQUENT

Assessment actual value

15.89

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

3,363 / 108.5 / 6.4 ❌ (3,135)

Flights above 26k feet.

464 / 15.0 / 0.9 ✔

Flights between 16k and 26k feet

167 / 5.4 / 0.3 ✔

Flights between 13k and 15k feet

104 / 3.4 / 0.2 ✔

Flights between 7k and 12k feet

562 / 18.1 / 1.1 ❌ (431)

Flights between 6k and 7k feet

969 / 31.3 / 1.8 ❌ (182)

Flights between 5k and 6k feet

842 / 27.2 / 1.6 ❌ (280)

Flights between 4k and 5k feet

209 / 6.7 / 0.4 ✔

Flights between 3k and 4k feet

16 / 0.5 / 0.0 ✔

Flights below 3k feet

30 / 1.0 / 0.1 ✔

4 or more flights per hour

288 / 9.3 ❌ (203)

9 or more flights per hour

132 / 4.3 ❌ (83)

Departures between 1.5k and 15k feet

30 / 1.0 / 0.1 ✔

Time and Sleep Analysis

For Assessment / Daily Avg. / Hourly Avg.

0 AM

9 / 0.3

1 AM

5 / 0.2

2 AM

5 / 0.2

3 AM

10 / 0.3

4 AM

10 / 0.3

5 AM

36 / 1.2

6 AM

248 / 8.0

7 AM

372 / 12.0

8 AM to 9 PM

2,614 / 84.3 / 6.0

10 PM

26 / 0.8

11 PM

15 / 0.5

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

34 ✔

Minimum avg. distance in miles

0.45

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

88.0 / 30.0 / 4.6 ❌ (72)

Flight holding stack identified?

No

Altitude for all flights

10,957 ❌ (16,202)

Altitude of departures between 1.5k and 15k feet

8,150 ✔

Altitude of flights below 20k feet

6,943 ❌ (8,007)

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

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

26.30

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

22.70

Thursday @ 8:00 - 4 time(s) in 4 weeks. Approx:13 flight events.

22.60

Thursday @ 10:00 - 4 time(s) in 4 weeks. Approx:13 flight events.

20.80

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

20.30

Thursday @ 9:00 - 4 time(s) in 4 weeks. Approx:11 flight events.

16.50

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

14.70

Thursday @ 12:00 - 4 time(s) in 4 weeks. Approx:8 flight events.

13.10

Thursday @ 13:00 - 4 time(s) in 4 weeks. Approx:7 flight events.

12.10

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