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

07/01/2024 18:20:35

UK Postcode

ROEHAMPTON-NORTH-WEST , LONDON , SW15 5JR

Baseline geo-coordinates

51.456 , -0.25578

Survey type

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

Assessment band

VERY HIGH

Assessment actual value

22.87

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

721 / 23.3 / 1.4 ✔

Flights above 26k feet.

37 / 1.2 / 0.1 ✔

Flights between 16k and 26k feet

11 / 0.4 / 0.0 ✔

Flights between 13k and 15k feet

6 / 0.2 / 0.0 ✔

Flights between 7k and 12k feet

6 / 0.2 / 0.0 ✔

Flights between 6k and 7k feet

3 / 0.1 / 0.0 ✔

Flights between 5k and 6k feet

2 / 0.1 / 0.0 ✔

Flights between 4k and 5k feet

3 / 0.1 / 0.0 ✔

Flights between 3k and 4k feet

110 / 3.5 / 0.2 ✔

Flights below 3k feet

543 / 17.5 / 1.0 ✔

4 or more flights per hour

42 / 1.4 ✔

9 or more flights per hour

39 / 1.3 ✔

Departures between 1.5k and 15k feet

5 / 0.2 / 0.0 ✔

Time and Sleep Analysis

For Assessment / Daily Avg. / Hourly Avg.

0 AM

4 / 0.1

1 AM

1 / 0.0

2 AM

3 AM

3 / 0.1

4 AM

2 / 0.1

5 AM

6 / 0.2

6 AM

60 / 1.9

7 AM

3 / 0.1

8 AM to 9 PM

588 / 19.0 / 1.4

10 PM

47 / 1.5

11 PM

4 / 0.1

Other Noise Disturbance, Vibration and Emissions factors

Time in seconds an aircraft existed in the airspace bubble

32 ❌ (22)

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

61 ❌ (43)

Minimum avg. distance in miles

0.63

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

21.0 / 13.0 / 1.1 ✔

Flight holding stack identified?

No

Altitude for all flights

4,851 ❌ (16,202)

Altitude of departures between 1.5k and 15k feet

4,271 ❌ (7,809)

Altitude of flights below 20k feet

3,091 ❌ (8,007)

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

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

39.00

Saturday @ 17:00 - 1 time(s) in 4 weeks. Approx:22 flight events.

37.50

Wednesday @ 18:00 - 1 time(s) in 4 weeks. Approx:21 flight events.

36.00

Friday @ 20:00 - 1 time(s) in 4 weeks. Approx:20 flight events.

34.50

Monday @ 15:00 - 1 time(s) in 4 weeks. Approx:19 flight events.