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

10/08/2021 12:52:58

UK Postcode

STREATHAM-HILL , LONDON , SW2 3TH

Baseline geo-coordinates

51.4411 , -0.12222

Survey type

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

Assessment band

OCCASIONAL

Assessment actual value

6.60

Assessment description

Sound equates to a "C" road or an active country lane i.e. irregular traffic volumes. Location is on a flight route as opposed to a flight corridor. Some of the flights will be below 7000 feet and could occur at evenings and weekends.

Band range

Lower: 4.0 --> Upper: 7.0

Volumes, Height bands, and Intensity.

For Assessment / Daily Avg. / Hourly Avg.

Count of ALL flights

1,266 / 40.8 / 2.4 ✔

Flights above 26k feet.

513 / 16.5 / 1.0 ❌ (382)

Flights between 16k and 26k feet

100 / 3.2 / 0.2 ✔

Flights between 13k and 15k feet

51 / 1.6 / 0.1 ✔

Flights between 7k and 12k feet

27 / 0.9 / 0.1 ✔

Flights between 6k and 7k feet

6 / 0.2 / 0.0 ✔

Flights between 5k and 6k feet

19 / 0.6 / 0.0 ✔

Flights between 4k and 5k feet

195 / 6.3 / 0.4 ✔

Flights between 3k and 4k feet

313 / 10.1 / 0.6 ❌ (170)

Flights below 3k feet

42 / 1.4 / 0.1 ✔

4 or more flights per hour

53 / 1.7 ✔

9 or more flights per hour

0 / 0.0 ✔

Departures between 1.5k and 15k feet

47 / 1.5 / 0.1 ✔

Time and Sleep Analysis

For Assessment / Daily Avg. / Hourly Avg.

0 AM

3 / 0.1

1 AM

9 / 0.3

2 AM

11 / 0.4

3 AM

8 / 0.3

4 AM

16 / 0.5

5 AM

20 / 0.6

6 AM

86 / 2.8

7 AM

119 / 3.8

8 AM to 9 PM

887 / 28.6 / 2.0

10 PM

33 / 1.1

11 PM

8 / 0.3

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

51 ❌ (41)

Minimum avg. distance in miles

0.49

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

18.0 / 9.0 / 0.9 ✔

Flight holding stack identified?

No

Altitude for all flights

18,970 ✔

Altitude of departures between 1.5k and 15k feet

10,098 ✔

Altitude of flights below 20k feet

6,355 ❌ (7,553)

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

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

6.38

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

5.63

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

4.75

Sunday @ 18:00 - 4 time(s) in 4 weeks. Approx:3 flight events.

11.67

Sunday @ 14:00 - 3 time(s) in 4 weeks. Approx:7 flight events.

8.50

Sunday @ 20:00 - 3 time(s) in 4 weeks. Approx:5 flight events.

8.00

Sunday @ 13:00 - 3 time(s) in 4 weeks. Approx:5 flight events.

7.17

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

6.67

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