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

07/03/2024 16:54:40

UK Postcode

SYDENHAM , LONDON , SE26 5QE

Baseline geo-coordinates

51.4254 , -0.050899

Survey type

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

Assessment band

REGULAR

Assessment actual value

8.74

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

2,690 / 86.8 / 5.1 ✔

Flights above 26k feet.

657 / 21.2 / 1.2 ❌ (635)

Flights between 16k and 26k feet

223 / 7.2 / 0.4 ✔

Flights between 13k and 15k feet

87 / 2.8 / 0.2 ✔

Flights between 7k and 12k feet

117 / 3.8 / 0.2 ✔

Flights between 6k and 7k feet

161 / 5.2 / 0.3 ✔

Flights between 5k and 6k feet

621 / 20.0 / 1.2 ❌ (301)

Flights between 4k and 5k feet

721 / 23.3 / 1.4 ❌ (259)

Flights between 3k and 4k feet

69 / 2.2 / 0.1 ✔

Flights below 3k feet

34 / 1.1 / 0.1 ✔

4 or more flights per hour

276 / 8.9 ❌ (210)

9 or more flights per hour

13 / 0.4 ✔

Departures between 1.5k and 15k feet

198 / 6.4 / 0.4 ✔

Time and Sleep Analysis

For Assessment / Daily Avg. / Hourly Avg.

0 AM

21 / 0.7

1 AM

18 / 0.6

2 AM

10 / 0.3

3 AM

10 / 0.3

4 AM

25 / 0.8

5 AM

75 / 2.4

6 AM

152 / 4.9

7 AM

144 / 4.6

8 AM to 9 PM

2,022 / 65.2 / 4.7

10 PM

128 / 4.1

11 PM

53 / 1.7

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

50 ❌ (42)

Minimum avg. distance in miles

0.47

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

60.0 / 30.0 / 3.2 ✔

Flight holding stack identified?

No

Altitude for all flights

13,695 ❌ (15,961)

Altitude of departures between 1.5k and 15k feet

9,355 ✔

Altitude of flights below 20k feet

6,635 ❌ (7,947)

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

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

10.70

Thursday @ 10:00 - 4 time(s) in 4 weeks. Approx:6 flight events.

10.10

Thursday @ 20:00 - 4 time(s) in 4 weeks. Approx:6 flight events.

9.90

Wednesday @ 16:00 - 4 time(s) in 4 weeks. Approx:6 flight events.

9.40

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

8.90

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

8.80

Thursday @ 21:00 - 4 time(s) in 4 weeks. Approx:5 flight events.

8.30

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

8.20

Friday @ 17:00 - 4 time(s) in 4 weeks. Approx:5 flight events.