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

22/02/2024 18:22:43

UK Postcode

SHEPHERDS-BUSH-WEST , LONDON , W12 8NX

Baseline geo-coordinates

51.5036 , -0.23053

Survey type

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

Assessment band

OCCASIONAL

Assessment actual value

4.71

Assessment description

Sound equates to a "C" road or an active country lane i.e. irregular traffic volumes. Location is on a flight route as opposed to a flight corridor. Some of the flights will be below 7000 feet and could occur at evenings and weekends.

Band range

Lower: 4.0 --> Upper: 7.0

Volumes, Height bands, and Intensity.

For Assessment / Daily Avg. / Hourly Avg.

Count of ALL flights

1,322 / 42.6 / 2.5 ✔

Flights above 26k feet.

857 / 27.6 / 1.6 ❌ (618)

Flights between 16k and 26k feet

152 / 4.9 / 0.3 ✔

Flights between 13k and 15k feet

144 / 4.6 / 0.3 ❌ (136)

Flights between 7k and 12k feet

73 / 2.4 / 0.1 ✔

Flights between 6k and 7k feet

12 / 0.4 / 0.0 ✔

Flights between 5k and 6k feet

1 / 0.0 / 0.0 ✔

Flights between 4k and 5k feet

4 / 0.1 / 0.0 ✔

Flights between 3k and 4k feet

2 / 0.1 / 0.0 ✔

Flights below 3k feet

77 / 2.5 / 0.1 ✔

4 or more flights per hour

6 / 0.2 ✔

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

20 / 0.6

1 AM

24 / 0.8

2 AM

26 / 0.8

3 AM

15 / 0.5

4 AM

25 / 0.8

5 AM

54 / 1.7

6 AM

56 / 1.8

7 AM

85 / 2.7

8 AM to 9 PM

891 / 28.7 / 2.1

10 PM

37 / 1.2

11 PM

45 / 1.5

Other Noise Disturbance, Vibration and Emissions factors

Time in seconds an aircraft existed in the airspace bubble

15 ✔

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

36 ✔

Minimum avg. distance in miles

0.44

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

4.0 / 2.0 / 0.2 ✔

Flight holding stack identified?

No

Altitude for all flights

27,419 ✔

Altitude of departures between 1.5k and 15k feet

5,036 ❌ (7,703)

Altitude of flights below 20k feet

11,817 ✔

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

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

3.00

Wednesday @ 17:00 - 3 time(s) in 4 weeks. Approx:2 flight events.

5.00

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

4.75

Thursday @ 16:00 - 2 time(s) in 4 weeks. Approx:3 flight events.

3.25

Wednesday @ 10:00 - 2 time(s) in 4 weeks. Approx:3 flight events.

3.00

Saturday @ 14:00 - 2 time(s) in 4 weeks. Approx:3 flight events.

2.75

Wednesday @ 7:00 - 2 time(s) in 4 weeks. Approx:3 flight events.

2.50

Friday @ 14:00 - 2 time(s) in 4 weeks. Approx:2 flight events.