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

14/09/2022 08:51:24

UK Postcode

CENTRAL-WESTMINSTER , LONDON , SW1H 9AH

Baseline geo-coordinates

51.5006 , -0.130627

Survey type

31 days from the 1st date shown in the Evidence table below .

Assessment band

REGULAR

Assessment actual value

11.84

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

2,953 / 95.3 / 5.6 ✔

Flights above 26k feet.

688 / 22.2 / 1.3 ✔

Flights between 16k and 26k feet

215 / 6.9 / 0.4 ✔

Flights between 13k and 15k feet

89 / 2.9 / 0.2 ✔

Flights between 7k and 12k feet

32 / 1.0 / 0.1 ✔

Flights between 6k and 7k feet

4 / 0.1 / 0.0 ✔

Flights between 5k and 6k feet

21 / 0.7 / 0.0 ✔

Flights between 4k and 5k feet

309 / 10.0 / 0.6 ✔

Flights between 3k and 4k feet

615 / 19.8 / 1.2 ❌ (267)

Flights below 3k feet

980 / 31.6 / 1.9 ❌ (731)

4 or more flights per hour

274 / 8.8 ❌ (217)

9 or more flights per hour

54 / 1.7 ✔

Departures between 1.5k and 15k feet

35 / 1.1 / 0.1 ✔

Time and Sleep Analysis

For Assessment / Daily Avg. / Hourly Avg.

0 AM

17 / 0.5

1 AM

18 / 0.6

2 AM

12 / 0.4

3 AM

17 / 0.5

4 AM

21 / 0.7

5 AM

47 / 1.5

6 AM

110 / 3.5

7 AM

194 / 6.3

8 AM to 9 PM

2,358 / 76.1 / 5.4

10 PM

57 / 1.8

11 PM

35 / 1.1

Other Noise Disturbance, Vibration and Emissions factors

Time in seconds an aircraft existed in the airspace bubble

20 ✔

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

40 ✔

Minimum avg. distance in miles

0.57

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

67.0 / 27.0 / 3.5 ✔

Flight holding stack identified?

No

Altitude for all flights

11,943 ❌ (16,276)

Altitude of departures between 1.5k and 15k feet

7,755 ❌ (7,941)

Altitude of flights below 20k feet

4,219 ❌ (8,043)

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

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

18.40

Tuesday @ 18:00 - 4 time(s) in 4 weeks. Approx:10 flight events.

13.30

Tuesday @ 17:00 - 4 time(s) in 4 weeks. Approx:8 flight events.

10.70

Monday @ 15:00 - 4 time(s) in 4 weeks. Approx:6 flight events.

10.50

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

10.40

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

10.20

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

9.70

Monday @ 10:00 - 4 time(s) in 4 weeks. Approx:5 flight events.

8.60

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