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

04/06/2023 15:58:10

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

10.14

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

2,907 / 93.8 / 5.5 ✔

Flights above 26k feet.

547 / 17.6 / 1.0 ✔

Flights between 16k and 26k feet

192 / 6.2 / 0.4 ✔

Flights between 13k and 15k feet

90 / 2.9 / 0.2 ✔

Flights between 7k and 12k feet

517 / 16.7 / 1.0 ❌ (445)

Flights between 6k and 7k feet

163 / 5.3 / 0.3 ✔

Flights between 5k and 6k feet

818 / 26.4 / 1.6 ❌ (328)

Flights between 4k and 5k feet

492 / 15.9 / 0.9 ❌ (272)

Flights between 3k and 4k feet

54 / 1.7 / 0.1 ✔

Flights below 3k feet

34 / 1.1 / 0.1 ✔

4 or more flights per hour

308 / 9.9 ❌ (215)

9 or more flights per hour

55 / 1.8 ✔

Departures between 1.5k and 15k feet

820 / 26.5 / 1.6 ❌ (447)

Time and Sleep Analysis

For Assessment / Daily Avg. / Hourly Avg.

0 AM

15 / 0.5

1 AM

9 / 0.3

2 AM

6 / 0.2

3 AM

5 / 0.2

4 AM

14 / 0.5

5 AM

43 / 1.4

6 AM

123 / 4.0

7 AM

186 / 6.0

8 AM to 9 PM

2,339 / 75.5 / 5.4

10 PM

110 / 3.5

11 PM

35 / 1.1

Other Noise Disturbance, Vibration and Emissions factors

Time in seconds an aircraft existed in the airspace bubble

19 ✔

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

53 ❌ (42)

Minimum avg. distance in miles

0.46

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

71.0 / 37.0 / 3.7 ✔

Flight holding stack identified?

No

Altitude for all flights

12,368 ❌ (15,823)

Altitude of departures between 1.5k and 15k feet

8,487 ✔

Altitude of flights below 20k feet

7,160 ❌ (7,986)

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

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

14.60

Saturday @ 13:00 - 4 time(s) in 4 weeks. Approx:8 flight events.

12.40

Friday @ 21:00 - 4 time(s) in 4 weeks. Approx:7 flight events.

10.30

Sunday @ 9:00 - 4 time(s) in 4 weeks. Approx:6 flight events.

9.30

Saturday @ 12:00 - 4 time(s) in 4 weeks. Approx:5 flight events.

9.00

Sunday @ 12:00 - 4 time(s) in 4 weeks. Approx:5 flight events.

8.50

Saturday @ 8:00 - 4 time(s) in 4 weeks. Approx:6 flight events.

8.20

Saturday @ 19:00 - 4 time(s) in 4 weeks. Approx:5 flight events.

8.10

Friday @ 15:00 - 4 time(s) in 4 weeks. Approx:5 flight events.