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

21/02/2022 09:24:02

UK Postcode

ST-JOHNS-WOOD-ABBEY-ROAD , LONDON , NW8 9DY

Baseline geo-coordinates

51.5326 , -0.180857

Survey type

31 Day. Based on the 31 days prior to the survey date shown above.

Assessment band

MINIMAL

Assessment actual value

3.52

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

739 / 23.8 / 1.4 ✔

Flights above 26k feet.

389 / 12.5 / 0.7 ❌ (382)

Flights between 16k and 26k feet

132 / 4.3 / 0.3 ✔

Flights between 13k and 15k feet

112 / 3.6 / 0.2 ❌ (80)

Flights between 7k and 12k feet

48 / 1.5 / 0.1 ✔

Flights between 6k and 7k feet

10 / 0.3 / 0.0 ✔

Flights between 5k and 6k feet

7 / 0.2 / 0.0 ✔

Flights between 4k and 5k feet

13 / 0.4 / 0.0 ✔

Flights between 3k and 4k feet

13 / 0.4 / 0.0 ✔

Flights below 3k feet

15 / 0.5 / 0.0 ✔

4 or more flights per hour

4 / 0.1 ✔

9 or more flights per hour

0 / 0.0 ✔

Departures between 1.5k and 15k feet

12 / 0.4 / 0.0 ✔

Time and Sleep Analysis

For Assessment / Daily Avg. / Hourly Avg.

0 AM

10 / 0.3

1 AM

9 / 0.3

2 AM

8 / 0.3

3 AM

5 / 0.2

4 AM

8 / 0.3

5 AM

16 / 0.5

6 AM

24 / 0.8

7 AM

43 / 1.4

8 AM to 9 PM

562 / 18.1 / 1.3

10 PM

16 / 0.5

11 PM

12 / 0.4

Other Noise Disturbance, Vibration and Emissions factors

Time in seconds an aircraft existed in the airspace bubble

14 ✔

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

36 ✔

Minimum avg. distance in miles

0.50

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

3.0 / 1.0 / 0.2 ✔

Flight holding stack identified?

No

Altitude for all flights

24,857 ✔

Altitude of departures between 1.5k and 15k feet

7,147 ❌ (7,653)

Altitude of flights below 20k feet

12,952 ✔

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

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

3.00

Tuesday @ 13:00 - 2 time(s) in 4 weeks. Approx:2 flight events.

2.75

Sunday @ 13:00 - 2 time(s) in 4 weeks. Approx:3 flight events.

7.00

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

6.50

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

4.00

Wednesday @ 9:00 - 1 time(s) in 4 weeks. Approx:3 flight events.

3.50

Tuesday @ 11:00 - 1 time(s) in 4 weeks. Approx:3 flight events.