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

04/12/2020 08:40:21

UK Postcode

GREENHITHE , KENT , DA9 9ST

Baseline geo-coordinates

51.4413 , 0.275291

Survey type

31 Day. Based on the 31 days prior to the survey date shown above.

Assessment band

MINIMAL

Assessment actual value

3.18

Assessment description

Sound equates to a quiet country lane i.e. irregular and low volume traffic. However, occasionally some of the flights could be below 7000 feet and could occur at evenings and weekends.

Band range

Lower: 0.0 --> Upper: 4.0

Volumes, Height bands, and Intensity.

For Assessment / Daily Avg. / Hourly Avg.

Count of ALL flights

452 / 14.6 / 0.9 ✔

Flights above 26k feet.

223 / 7.2 / 0.4 ❌ (218)

Flights between 16k and 26k feet

29 / 0.9 / 0.1 ✔

Flights between 13k and 15k feet

8 / 0.3 / 0.0 ✔

Flights between 7k and 12k feet

15 / 0.5 / 0.0 ✔

Flights between 6k and 7k feet

1 / 0.0 / 0.0 ✔

Flights between 5k and 6k feet

1 / 0.0 / 0.0 ✔

Flights between 4k and 5k feet

3 / 0.1 / 0.0 ✔

Flights between 3k and 4k feet

37 / 1.2 / 0.1 ✔

Flights below 3k feet

135 / 4.4 / 0.3 ✔

4 or more flights per hour

1 / 0.0 ✔

9 or more flights per hour

0 / 0.0 ✔

Departures between 1.5k and 15k feet

15 / 0.5 / 0.0 ✔

Time and Sleep Analysis

For Assessment / Daily Avg. / Hourly Avg.

0 AM

15 / 0.5

1 AM

5 / 0.2

2 AM

1 / 0.0

3 AM

6 / 0.2

4 AM

12 / 0.4

5 AM

15 / 0.5

6 AM

9 / 0.3

7 AM

15 / 0.5

8 AM to 9 PM

329 / 10.6 / 0.8

10 PM

12 / 0.4

11 PM

5 / 0.2

Other Noise Disturbance, Vibration and Emissions factors

Time in seconds an aircraft existed in the airspace bubble

21 ✔

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

13 ✔

Minimum avg. distance in miles

0.68

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

3.0 / 0.0 / 0.2 ✔

Flight holding stack identified?

No

Altitude for all flights

20,743 ✔

Altitude of departures between 1.5k and 15k feet

11,273 ✔

Altitude of flights below 20k feet

5,001 ❌ (7,529)

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

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

3.17

Wednesday @ 11:00 - 3 time(s) in 4 weeks. Approx:2 flight events.

5.50

Wednesday @ 13:00 - 2 time(s) in 4 weeks. Approx:3 flight events.

3.75

Wednesday @ 15:00 - 2 time(s) in 4 weeks. Approx:3 flight events.

3.50

Friday @ 17:00 - 2 time(s) in 4 weeks. Approx:3 flight events.

3.00

Friday @ 15:00 - 2 time(s) in 4 weeks. Approx:2 flight events.

2.75

Thursday @ 9:00 - 2 time(s) in 4 weeks. Approx:2 flight events.