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

03/09/2023 19:13:11

UK Postcode

MUSWELL-HILL-SOUTH , LONDON , N10 3UN

Baseline geo-coordinates

51.5857 , -0.141686

Survey type

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

Assessment band

VERY HIGH

Assessment actual value

21.94

Assessment description

Sound equates to a busy Dual Carriageway or Motorway i.e. very regular traffic that will be noticeable at peak times which includes evenings and weekends. Location is on a flight path or primary flight corridor and subject to Arrivals and/or Departures. At times there will be multiple flight occurrences within the same hour, typically between 10 to 20.

Band range

Lower: 20.0 --> Upper: 30.0

Volumes, Height bands, and Intensity.

For Assessment / Daily Avg. / Hourly Avg.

Count of ALL flights

6,173 / 199.1 / 11.7 ❌ (3,428)

Flights above 26k feet.

794 / 25.6 / 1.5 ❌ (724)

Flights between 16k and 26k feet

353 / 11.4 / 0.7 ❌ (325)

Flights between 13k and 15k feet

181 / 5.8 / 0.3 ❌ (161)

Flights between 7k and 12k feet

1,262 / 40.7 / 2.4 ❌ (500)

Flights between 6k and 7k feet

2,059 / 66.4 / 3.9 ❌ (169)

Flights between 5k and 6k feet

1,300 / 41.9 / 2.5 ❌ (265)

Flights between 4k and 5k feet

161 / 5.2 / 0.3 ✔

Flights between 3k and 4k feet

13 / 0.4 / 0.0 ✔

Flights below 3k feet

50 / 1.6 / 0.1 ✔

4 or more flights per hour

427 / 13.8 ❌ (218)

9 or more flights per hour

312 / 10.1 ❌ (91)

Departures between 1.5k and 15k feet

115 / 3.7 / 0.2 ✔

Time and Sleep Analysis

For Assessment / Daily Avg. / Hourly Avg.

0 AM

35 / 1.1

1 AM

29 / 0.9

2 AM

20 / 0.6

3 AM

21 / 0.7

4 AM

9 / 0.3

5 AM

50 / 1.6

6 AM

337 / 10.9

7 AM

380 / 12.3

8 AM to 9 PM

5,100 / 164.5 / 11.8

10 PM

108 / 3.5

11 PM

59 / 1.9

Other Noise Disturbance, Vibration and Emissions factors

Time in seconds an aircraft existed in the airspace bubble

19 ✔

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

48 ❌ (43)

Minimum avg. distance in miles

0.44

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

163.0 / 79.0 / 8.6 ❌ (78)

Flight holding stack identified?

No

Altitude for all flights

10,927 ❌ (16,286)

Altitude of departures between 1.5k and 15k feet

6,134 ❌ (7,901)

Altitude of flights below 20k feet

6,976 ❌ (8,018)

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

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

28.30

Thursday @ 11:00 - 4 time(s) in 4 weeks. Approx:16 flight events.

27.20

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

26.00

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

24.80

Sunday @ 16:00 - 4 time(s) in 4 weeks. Approx:14 flight events.

24.70

Monday @ 12:00 - 4 time(s) in 4 weeks. Approx:14 flight events.

24.60

Monday @ 6:00 - 4 time(s) in 4 weeks. Approx:13 flight events.

24.50

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

24.40

Monday @ 13:00 - 4 time(s) in 4 weeks. Approx:14 flight events.