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

13/02/2024 09:37:22

UK Postcode

SPRINGFIELD , LONDON , SW18 3NN

Baseline geo-coordinates

51.4443 , -0.177277

Survey type

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

Assessment band

MINIMAL

Assessment actual value

2.95

Assessment description

Sound equates to a quiet country lane i.e. irregular and low volume traffic. However, occasionally some of the flights could be below 7000 feet and could occur at evenings and weekends.

Band range

Lower: 0.0 --> Upper: 4.0

Volumes, Height bands, and Intensity.

For Assessment / Daily Avg. / Hourly Avg.

Count of ALL flights

321 / 10.4 / 0.6 ✔

Flights above 26k feet.

154 / 5.0 / 0.3 ✔

Flights between 16k and 26k feet

41 / 1.3 / 0.1 ✔

Flights between 13k and 15k feet

20 / 0.6 / 0.0 ✔

Flights between 7k and 12k feet

13 / 0.4 / 0.0 ✔

Flights between 6k and 7k feet

12 / 0.4 / 0.0 ✔

Flights between 5k and 6k feet

23 / 0.7 / 0.0 ✔

Flights between 4k and 5k feet

5 / 0.2 / 0.0 ✔

Flights between 3k and 4k feet

13 / 0.4 / 0.0 ✔

Flights below 3k feet

40 / 1.3 / 0.1 ✔

4 or more flights per hour

1 / 0.0 ✔

9 or more flights per hour

0 / 0.0 ✔

Departures between 1.5k and 15k feet

43 / 1.4 / 0.1 ✔

Time and Sleep Analysis

For Assessment / Daily Avg. / Hourly Avg.

0 AM

5 / 0.2

1 AM

2 / 0.1

2 AM

3 AM

4 / 0.1

4 AM

1 / 0.0

5 AM

3 / 0.1

6 AM

17 / 0.5

7 AM

20 / 0.6

8 AM to 9 PM

225 / 7.3 / 0.5

10 PM

5 / 0.2

11 PM

5 / 0.2

Other Noise Disturbance, Vibration and Emissions factors

Time in seconds an aircraft existed in the airspace bubble

17 ✔

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

53 ❌ (43)

Minimum avg. distance in miles

0.50

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

2.0 / 1.0 / 0.1 ✔

Flight holding stack identified?

No

Altitude for all flights

23,335 ✔

Altitude of departures between 1.5k and 15k feet

7,691 ❌ (7,809)

Altitude of flights below 20k feet

9,352 ✔

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

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

3.00

Wednesday @ 16:00 - 2 time(s) in 4 weeks. Approx:2 flight events.

8.50

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

4.50

Wednesday @ 14:00 - 1 time(s) in 4 weeks. Approx:3 flight events.

3.50

Monday @ 10:00 - 1 time(s) in 4 weeks. Approx:3 flight events.

3.00

Sunday @ 10:00 - 1 time(s) in 4 weeks. Approx:3 flight events.