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

09/05/2023 15:50:40

UK Postcode

MILLLAND , WEST SUSSEX , GU30 7NA

Baseline geo-coordinates

51.0306 , -0.80081

Survey type

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

Assessment band

REGULAR

Assessment actual value

8.87

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

2,927 / 94.4 / 5.6 ✔

Flights above 26k feet.

947 / 30.5 / 1.8 ❌ (630)

Flights between 16k and 26k feet

171 / 5.5 / 0.3 ✔

Flights between 13k and 15k feet

327 / 10.5 / 0.6 ❌ (142)

Flights between 7k and 12k feet

903 / 29.1 / 1.7 ❌ (440)

Flights between 6k and 7k feet

87 / 2.8 / 0.2 ✔

Flights between 5k and 6k feet

348 / 11.2 / 0.7 ❌ (296)

Flights between 4k and 5k feet

105 / 3.4 / 0.2 ✔

Flights between 3k and 4k feet

4 / 0.1 / 0.0 ✔

Flights below 3k feet

35 / 1.1 / 0.1 ✔

4 or more flights per hour

265 / 8.5 ❌ (209)

9 or more flights per hour

24 / 0.8 ✔

Departures between 1.5k and 15k feet

675 / 21.8 / 1.3 ❌ (417)

Time and Sleep Analysis

For Assessment / Daily Avg. / Hourly Avg.

0 AM

12 / 0.4

1 AM

8 / 0.3

2 AM

4 / 0.1

3 AM

2 / 0.1

4 AM

4 / 0.1

5 AM

10 / 0.3

6 AM

151 / 4.9

7 AM

205 / 6.6

8 AM to 9 PM

2,431 / 78.4 / 5.6

10 PM

57 / 1.8

11 PM

23 / 0.7

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

44 ❌ (42)

Minimum avg. distance in miles

0.34

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

57.0 / 26.0 / 3.0 ✔

Flight holding stack identified?

No

Altitude for all flights

18,097 ✔

Altitude of departures between 1.5k and 15k feet

11,767 ✔

Altitude of flights below 20k feet

10,434 ✔

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

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

11.10

Monday @ 10:00 - 4 time(s) in 4 weeks. Approx:7 flight events.

9.80

Sunday @ 13:00 - 4 time(s) in 4 weeks. Approx:7 flight events.

8.60

Monday @ 12:00 - 4 time(s) in 4 weeks. Approx:6 flight events.

8.30

Sunday @ 18:00 - 4 time(s) in 4 weeks. Approx:6 flight events.

8.20

Monday @ 18:00 - 4 time(s) in 4 weeks. Approx:5 flight events.

8.10

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