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

26/02/2024 10:52:51

UK Postcode

WEST-END , SURREY , GU24 9NS

Baseline geo-coordinates

51.3395 , -0.653768

Survey type

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

Assessment band

REGULAR

Assessment actual value

10.63

Assessment description

Sound equates to a "B" road or busy "C" road i.e. regular traffic that will be noticeable at peak times which includes evenings and weekends. Location is on a secondary 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 4. Some of the flights will be below 7000 feet.

Band range

Lower: 7.0 --> Upper: 12.0

Volumes, Height bands, and Intensity.

For Assessment / Daily Avg. / Hourly Avg.

Count of ALL flights

3,826 / 123.4 / 7.3 ❌ (3,248)

Flights above 26k feet.

2,050 / 66.1 / 3.9 ❌ (621)

Flights between 16k and 26k feet

371 / 12.0 / 0.7 ❌ (295)

Flights between 13k and 15k feet

36 / 1.2 / 0.1 ✔

Flights between 7k and 12k feet

713 / 23.0 / 1.4 ❌ (419)

Flights between 6k and 7k feet

472 / 15.2 / 0.9 ❌ (189)

Flights between 5k and 6k feet

165 / 5.3 / 0.3 ✔

Flights between 4k and 5k feet

5 / 0.2 / 0.0 ✔

Flights between 3k and 4k feet

0 ❌ (401)

Flights below 3k feet

14 / 0.5 / 0.0 ✔

4 or more flights per hour

185 / 6.0 ✔

9 or more flights per hour

39 / 1.3 ✔

Departures between 1.5k and 15k feet

697 / 22.5 / 1.3 ❌ (401)

Time and Sleep Analysis

For Assessment / Daily Avg. / Hourly Avg.

0 AM

27 / 0.9

1 AM

13 / 0.4

2 AM

6 / 0.2

3 AM

9 / 0.3

4 AM

10 / 0.3

5 AM

17 / 0.5

6 AM

136 / 4.4

7 AM

235 / 7.6

8 AM to 9 PM

3,138 / 101.2 / 7.2

10 PM

122 / 3.9

11 PM

57 / 1.8

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

31 ✔

Minimum avg. distance in miles

0.47

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

42.0 / 14.0 / 2.2 ✔

Flight holding stack identified?

No

Altitude for all flights

22,733 ✔

Altitude of departures between 1.5k and 15k feet

7,235 ❌ (7,733)

Altitude of flights below 20k feet

7,985 ✔

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

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

17.50

Thursday @ 9:00 - 4 time(s) in 4 weeks. Approx:10 flight events.

12.70

Thursday @ 8:00 - 4 time(s) in 4 weeks. Approx:7 flight events.

9.20

Wednesday @ 9:00 - 4 time(s) in 4 weeks. Approx:5 flight events.

9.10

Thursday @ 11:00 - 4 time(s) in 4 weeks. Approx:5 flight events.

8.20

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

7.70

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

5.80

Wednesday @ 8:00 - 4 time(s) in 4 weeks. Approx:3 flight events.

22.88

Thursday @ 10:00 - 4 time(s) in 4 weeks. Approx:13 flight events.

12.13

Thursday @ 15:00 - 4 time(s) in 4 weeks. Approx:7 flight events.