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

13/12/2021 08:09:05

UK Postcode

STOKE-D-ABERNON , SURREY , KT11 3HZ

Baseline geo-coordinates

51.3201 , -0.389821

Survey type

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

Assessment band

FREQUENT

Assessment actual value

14.85

Assessment description

Sound equates to an "A" road or a busy "B" road i.e. regular traffic that will be noticeable at peak times which includes evenings and weekends. Location is on a primary flight corridor or flight route or in a flight holding stack area. At times there will be multiple flight occurrences within the same hour, typically between 4-10. Some of the flights will be below 7000 feet.

Band range

Lower: 12.0 --> Upper: 16.0

Volumes, Height bands, and Intensity.

For Assessment / Daily Avg. / Hourly Avg.

Count of ALL flights

4,464 / 144.0 / 8.5 ❌ (3,426)

Flights above 26k feet.

325 / 10.5 / 0.6 ✔

Flights between 16k and 26k feet

468 / 15.1 / 0.9 ❌ (326)

Flights between 13k and 15k feet

94 / 3.0 / 0.2 ✔

Flights between 7k and 12k feet

2,396 / 77.3 / 4.5 ❌ (479)

Flights between 6k and 7k feet

681 / 22.0 / 1.3 ❌ (165)

Flights between 5k and 6k feet

432 / 13.9 / 0.8 ❌ (269)

Flights between 4k and 5k feet

19 / 0.6 / 0.0 ✔

Flights between 3k and 4k feet

1 / 0.0 / 0.0 ✔

Flights below 3k feet

47 / 1.5 / 0.1 ✔

4 or more flights per hour

465 / 15.0 ❌ (217)

9 or more flights per hour

216 / 7.0 ❌ (91)

Departures between 1.5k and 15k feet

1,125 / 36.3 / 2.1 ❌ (427)

Time and Sleep Analysis

For Assessment / Daily Avg. / Hourly Avg.

0 AM

7 / 0.2

1 AM

4 / 0.1

2 AM

3 / 0.1

3 AM

7 / 0.2

4 AM

11 / 0.4

5 AM

83 / 2.7

6 AM

279 / 9.0

7 AM

343 / 11.1

8 AM to 9 PM

3,514 / 113.4 / 8.1

10 PM

135 / 4.4

11 PM

48 / 1.5

Other Noise Disturbance, Vibration and Emissions factors

Time in seconds an aircraft existed in the airspace bubble

19 ✔

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

51 ❌ (43)

Minimum avg. distance in miles

0.69

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

130.0 / 68.0 / 6.8 ❌ (78)

Flight holding stack identified?

Yes ❌

Altitude for all flights

10,846 ❌ (16,230)

Altitude of departures between 1.5k and 15k feet

7,273 ❌ (7,884)

Altitude of flights below 20k feet

8,826 ✔

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

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

19.80

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

19.60

Sunday @ 7:00 - 4 time(s) in 4 weeks. Approx:12 flight events.

19.10

Saturday @ 9:00 - 4 time(s) in 4 weeks. Approx:11 flight events.

18.70

Sunday @ 10:00 - 4 time(s) in 4 weeks. Approx:11 flight events.

18.60

Saturday @ 14:00 - 4 time(s) in 4 weeks. Approx:11 flight events.

17.60

Sunday @ 8:00 - 4 time(s) in 4 weeks. Approx:10 flight events.

17.40

Saturday @ 6:00 - 4 time(s) in 4 weeks. Approx:10 flight events.