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

24/01/2021 11:37:59

UK Postcode

WANDSWORTH , LONDON , SW18 1TQ

Baseline geo-coordinates

51.4596 , -0.189774

Survey type

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

Assessment band

HIGH

Assessment actual value

17.83

Assessment description

Sound equates to a busy "A" road or Dual Carriageway i.e. regular traffic that will be noticeable at peak times which includes evenings and weekends. Location is on a primary flight corridor or busy flight route or in a flight holding stack area. At times there will be multiple flight occurrences within the same hour, typically between 4-15. Some of the flights will be below 7000 feet.

Band range

Lower: 16.0 --> Upper: 20.0

Volumes, Height bands, and Intensity.

For Assessment / Daily Avg. / Hourly Avg.

Count of ALL flights

2,077 / 67.0 / 3.9 ❌ (1,127)

Flights above 26k feet.

137 / 4.4 / 0.3 ✔

Flights between 16k and 26k feet

27 / 0.9 / 0.1 ✔

Flights between 13k and 15k feet

4 / 0.1 / 0.0 ✔

Flights between 7k and 12k feet

15 / 0.5 / 0.0 ✔

Flights between 6k and 7k feet

3 / 0.1 / 0.0 ✔

Flights between 5k and 6k feet

1 / 0.0 / 0.0 ✔

Flights between 4k and 5k feet

114 / 3.7 / 0.2 ✔

Flights between 3k and 4k feet

1,261 / 40.7 / 2.4 ❌ (148)

Flights below 3k feet

515 / 16.6 / 1.0 ❌ (207)

4 or more flights per hour

178 / 5.7 ❌ (78)

9 or more flights per hour

106 / 3.4 ❌ (23)

Departures between 1.5k and 15k feet

3 / 0.1 / 0.0 ✔

Time and Sleep Analysis

For Assessment / Daily Avg. / Hourly Avg.

0 AM

5 / 0.2

1 AM

4 / 0.1

2 AM

1 / 0.0

3 AM

4 / 0.1

4 AM

23 / 0.7

5 AM

60 / 1.9

6 AM

186 / 6.0

7 AM

113 / 3.6

8 AM to 9 PM

1,645 / 53.1 / 3.8

10 PM

11 / 0.4

11 PM

5 / 0.2

Other Noise Disturbance, Vibration and Emissions factors

Time in seconds an aircraft existed in the airspace bubble

34 ❌ (21)

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

44 ❌ (41)

Minimum avg. distance in miles

0.65

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

60.0 / 27.0 / 3.2 ❌ (25)

Flight holding stack identified?

No

Altitude for all flights

5,794 ❌ (16,167)

Altitude of departures between 1.5k and 15k feet

3,699 ❌ (7,836)

Altitude of flights below 20k feet

3,542 ❌ (7,529)

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

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

5.38

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

3.38

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

26.67

Thursday @ 8:00 - 3 time(s) in 4 weeks. Approx:15 flight events.

26.17

Thursday @ 6:00 - 3 time(s) in 4 weeks. Approx:14 flight events.

23.67

Thursday @ 12:00 - 3 time(s) in 4 weeks. Approx:13 flight events.

22.50

Thursday @ 9:00 - 3 time(s) in 4 weeks. Approx:12 flight events.

22.33

Thursday @ 10:00 - 3 time(s) in 4 weeks. Approx:12 flight events.

18.83

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

18.33

Thursday @ 14:00 - 3 time(s) in 4 weeks. Approx:10 flight events.