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

05/01/2022 08:28:43

UK Postcode

GERRARDS-CROSS , BUCKINGHAMSHIRE , SL9 7AD

Baseline geo-coordinates

51.585 , -0.551076

Survey type

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

Assessment band

FREQUENT

Assessment actual value

12.40

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

1,836 / 59.2 / 3.5 ✔

Flights above 26k feet.

403 / 13.0 / 0.8 ✔

Flights between 16k and 26k feet

145 / 4.7 / 0.3 ✔

Flights between 13k and 15k feet

18 / 0.6 / 0.0 ✔

Flights between 7k and 12k feet

471 / 15.2 / 0.9 ❌ (431)

Flights between 6k and 7k feet

471 / 15.2 / 0.9 ❌ (182)

Flights between 5k and 6k feet

116 / 3.7 / 0.2 ✔

Flights between 4k and 5k feet

7 / 0.2 / 0.0 ✔

Flights between 3k and 4k feet

7 / 0.2 / 0.0 ✔

Flights below 3k feet

198 / 6.4 / 0.4 ✔

4 or more flights per hour

123 / 4.0 ✔

9 or more flights per hour

49 / 1.6 ✔

Departures between 1.5k and 15k feet

112 / 3.6 / 0.2 ✔

Time and Sleep Analysis

For Assessment / Daily Avg. / Hourly Avg.

0 AM

4 / 0.1

1 AM

1 / 0.0

2 AM

4 / 0.1

3 AM

14 / 0.5

4 AM

23 / 0.7

5 AM

38 / 1.2

6 AM

101 / 3.3

7 AM

113 / 3.6

8 AM to 9 PM

1,347 / 43.5 / 3.1

10 PM

36 / 1.2

11 PM

7 / 0.2

Other Noise Disturbance, Vibration and Emissions factors

Time in seconds an aircraft existed in the airspace bubble

22 ✔

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

41 ✔

Minimum avg. distance in miles

0.48

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

37.0 / 15.0 / 1.9 ✔

Flight holding stack identified?

No

Altitude for all flights

14,493 ❌ (16,202)

Altitude of departures between 1.5k and 15k feet

6,901 ❌ (7,809)

Altitude of flights below 20k feet

6,947 ❌ (8,007)

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

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

14.13

Tuesday @ 14:00 - 4 time(s) in 4 weeks. Approx:9 flight events.

9.63

Monday @ 14:00 - 4 time(s) in 4 weeks. Approx:6 flight events.

7.38

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

17.50

Monday @ 13:00 - 3 time(s) in 4 weeks. Approx:10 flight events.

14.17

Sunday @ 11:00 - 3 time(s) in 4 weeks. Approx:8 flight events.

12.33

Tuesday @ 15:00 - 3 time(s) in 4 weeks. Approx:7 flight events.

9.67

Friday @ 18:00 - 3 time(s) in 4 weeks. Approx:6 flight events.

9.17

Monday @ 9:00 - 3 time(s) in 4 weeks. Approx:5 flight events.