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

15/09/2024 18:19:24

UK Postcode

CLAVERHAM-BRISTOL , AVON , BS49 4LW

Baseline geo-coordinates

51.391 , -2.79702

Survey type

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

Assessment band

HIGH

Assessment actual value

18.47

Assessment description

Likely to encounter both night-time and day-time noise disturbances that are caused by high volumes of planes flying at at low altitude. Also expect a visual impact too.

Band range

Lower: 16.0 --> Upper: 20.0

Volumes, Height bands, and Intensity.

For Assessment / Daily Avg. / Hourly Avg.

Count of ALL flights

3,900 / 125.8 / 7.4 ❌ (3,275)

Flights above 26k feet.

84 / 2.7 / 0.2 ✔

Flights between 16k and 26k feet

20 / 0.6 / 0.0 ✔

Flights between 13k and 15k feet

1 / 0.0 / 0.0 ✔

Flights between 7k and 12k feet

10 / 0.3 / 0.0 ✔

Flights between 6k and 7k feet

4 / 0.1 / 0.0 ✔

Flights between 5k and 6k feet

11 / 0.4 / 0.0 ✔

Flights between 4k and 5k feet

44 / 1.4 / 0.1 ✔

Flights between 3k and 4k feet

357 / 11.5 / 0.7 ❌ (265)

Flights below 3k feet

3,369 / 108.7 / 6.4 ❌ (773)

4 or more flights per hour

421 / 13.6 ❌ (209)

9 or more flights per hour

154 / 5.0 ❌ (87)

Departures between 1.5k and 15k feet

3,231 / 104.2 / 6.1 ❌ (390)

Time and Sleep Analysis

For Assessment / Daily Avg. / Hourly Avg.

0 AM

31 / 1.0

1 AM

25 / 0.8

2 AM

9 / 0.3

3 AM

5 / 0.2

4 AM

3 / 0.1

5 AM

5 / 0.2

6 AM

446 / 14.4

7 AM

443 / 14.3

8 AM to 9 PM

2,811 / 90.7 / 6.5

10 PM

62 / 2.0

11 PM

54 / 1.7

Other Noise Disturbance, Vibration and Emissions factors

Time in seconds an aircraft existed in the airspace bubble

23 ❌ (23)

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

50 ❌ (43)

Minimum avg. distance in miles

0.76

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

121.0 / 62.0 / 6.4 ❌ (76)

Flight holding stack identified?

No

Altitude for all flights

3,279 ❌ (16,138)

Altitude of departures between 1.5k and 15k feet

2,661 ❌ (7,815)

Altitude of flights below 20k feet

2,515 ❌ (7,963)

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

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

43.20

Tuesday @ 6:00 - 4 time(s) in 4 weeks. Approx:19 flight events.

41.20

Tuesday @ 7:00 - 4 time(s) in 4 weeks. Approx:18 flight events.

34.10

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

30.50

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

28.00

Monday @ 17:00 - 4 time(s) in 4 weeks. Approx:12 flight events.

24.00

Tuesday @ 16:00 - 4 time(s) in 4 weeks. Approx:10 flight events.

23.90

Saturday @ 13:00 - 4 time(s) in 4 weeks. Approx:11 flight events.

23.50

Sunday @ 7:00 - 4 time(s) in 4 weeks. Approx:11 flight events.

22.00

Tuesday @ 19:00 - 4 time(s) in 4 weeks. Approx:9 flight events.