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

13/05/2022 17:44:58

UK Postcode

BEDFORD-PARK , LONDON , W4 1JN

Baseline geo-coordinates

51.4969 , -0.260797

Survey type

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

Assessment band

OCCASIONAL

Assessment actual value

4.11

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

1,006 / 32.5 / 1.9 ✔

Flights above 26k feet.

579 / 18.7 / 1.1 ✔

Flights between 16k and 26k feet

178 / 5.7 / 0.3 ✔

Flights between 13k and 15k feet

115 / 3.7 / 0.2 ✔

Flights between 7k and 12k feet

76 / 2.5 / 0.1 ✔

Flights between 6k and 7k feet

7 / 0.2 / 0.0 ✔

Flights between 5k and 6k feet

9 / 0.3 / 0.0 ✔

Flights between 4k and 5k feet

4 / 0.1 / 0.0 ✔

Flights between 3k and 4k feet

0 ✔

Flights below 3k feet

38 / 1.2 / 0.1 ✔

4 or more flights per hour

9 / 0.3 ✔

9 or more flights per hour

0 / 0.0 ✔

Departures between 1.5k and 15k feet

18 / 0.6 / 0.0 ✔

Time and Sleep Analysis

For Assessment / Daily Avg. / Hourly Avg.

0 AM

25 / 0.8

1 AM

19 / 0.6

2 AM

10 / 0.3

3 AM

5 / 0.2

4 AM

6 / 0.2

5 AM

6 / 0.2

6 AM

36 / 1.2

7 AM

54 / 1.7

8 AM to 9 PM

700 / 22.6 / 1.6

10 PM

44 / 1.4

11 PM

42 / 1.4

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

47 ❌ (42)

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

26,662 ✔

Altitude of departures between 1.5k and 15k feet

7,028 ❌ (7,646)

Altitude of flights below 20k feet

13,864 ✔

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

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

4.50

Wednesday @ 15:00 - 2 time(s) in 4 weeks. Approx:4 flight events.

4.25

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

3.00

Thursday @ 12:00 - 2 time(s) in 4 weeks. Approx:3 flight events.

8.00

Sunday @ 22:00 - 1 time(s) in 4 weeks. Approx:6 flight events.

6.50

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

6.00

Sunday @ 23:00 - 1 time(s) in 4 weeks. Approx:4 flight events.