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

17/03/2024 20:15:30

UK Postcode

ST-GILES , LONDON , WC2H 9LN

Baseline geo-coordinates

51.5136 , -0.127417

Survey type

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

Assessment band

INTERMITTENT

Assessment actual value

6.14

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

1,455 / 46.9 / 2.8 ✔

Flights above 26k feet.

631 / 20.4 / 1.2 ✔

Flights between 16k and 26k feet

271 / 8.7 / 0.5 ✔

Flights between 13k and 15k feet

112 / 3.6 / 0.2 ✔

Flights between 7k and 12k feet

25 / 0.8 / 0.0 ✔

Flights between 6k and 7k feet

7 / 0.2 / 0.0 ✔

Flights between 5k and 6k feet

33 / 1.1 / 0.1 ✔

Flights between 4k and 5k feet

144 / 4.6 / 0.3 ✔

Flights between 3k and 4k feet

138 / 4.5 / 0.3 ✔

Flights below 3k feet

94 / 3.0 / 0.2 ✔

4 or more flights per hour

59 / 1.9 ✔

9 or more flights per hour

1 / 0.0 ✔

Departures between 1.5k and 15k feet

14 / 0.5 / 0.0 ✔

Time and Sleep Analysis

For Assessment / Daily Avg. / Hourly Avg.

0 AM

19 / 0.6

1 AM

16 / 0.5

2 AM

16 / 0.5

3 AM

6 / 0.2

4 AM

12 / 0.4

5 AM

23 / 0.7

6 AM

46 / 1.5

7 AM

51 / 1.6

8 AM to 9 PM

1,127 / 36.4 / 2.6

10 PM

61 / 2.0

11 PM

52 / 1.7

Other Noise Disturbance, Vibration and Emissions factors

Time in seconds an aircraft existed in the airspace bubble

18 ✔

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

46 ❌ (43)

Minimum avg. distance in miles

0.47

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

15.0 / 7.0 / 0.8 ✔

Flight holding stack identified?

No

Altitude for all flights

20,473 ✔

Altitude of departures between 1.5k and 15k feet

7,714 ❌ (7,941)

Altitude of flights below 20k feet

8,522 ✔

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

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

4.13

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

3.75

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

8.50

Saturday @ 14:00 - 3 time(s) in 4 weeks. Approx:5 flight events.

5.83

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

5.67

Monday @ 15:00 - 3 time(s) in 4 weeks. Approx:3 flight events.

4.83

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

4.50

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