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

12/04/2021 19:10:21

UK Postcode

HARLESDEN , LONDON , NW10 4DY

Baseline geo-coordinates

51.5395 , -0.248256

Survey type

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

Assessment band

OCCASIONAL

Assessment actual value

5.62

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

719 / 23.2 / 1.4 ✔

Flights above 26k feet.

205 / 6.6 / 0.4 ✔

Flights between 16k and 26k feet

56 / 1.8 / 0.1 ✔

Flights between 13k and 15k feet

82 / 2.6 / 0.2 ❌ (80)

Flights between 7k and 12k feet

107 / 3.5 / 0.2 ✔

Flights between 6k and 7k feet

36 / 1.2 / 0.1 ✔

Flights between 5k and 6k feet

104 / 3.4 / 0.2 ✔

Flights between 4k and 5k feet

90 / 2.9 / 0.2 ✔

Flights between 3k and 4k feet

9 / 0.3 / 0.0 ✔

Flights below 3k feet

30 / 1.0 / 0.1 ✔

4 or more flights per hour

34 / 1.1 ✔

9 or more flights per hour

1 / 0.0 ✔

Departures between 1.5k and 15k feet

257 / 8.3 / 0.5 ❌ (238)

Time and Sleep Analysis

For Assessment / Daily Avg. / Hourly Avg.

0 AM

9 / 0.3

1 AM

5 / 0.2

2 AM

4 / 0.1

3 AM

6 / 0.2

4 AM

9 / 0.3

5 AM

20 / 0.6

6 AM

19 / 0.6

7 AM

32 / 1.0

8 AM to 9 PM

535 / 17.3 / 1.2

10 PM

26 / 0.8

11 PM

16 / 0.5

Other Noise Disturbance, Vibration and Emissions factors

Time in seconds an aircraft existed in the airspace bubble

18 ✔

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

67 ❌ (41)

Minimum avg. distance in miles

0.46

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

9.0 / 6.0 / 0.5 ✔

Flight holding stack identified?

No

Altitude for all flights

17,128 ✔

Altitude of departures between 1.5k and 15k feet

5,417 ❌ (7,653)

Altitude of flights below 20k feet

8,575 ✔

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

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

7.17

Saturday @ 11:00 - 3 time(s) in 4 weeks. Approx:4 flight events.

3.50

Friday @ 17:00 - 3 time(s) in 4 weeks. Approx:2 flight events.

13.25

Friday @ 19:00 - 2 time(s) in 4 weeks. Approx:7 flight events.

9.75

Saturday @ 10:00 - 2 time(s) in 4 weeks. Approx:5 flight events.

9.25

Friday @ 10:00 - 2 time(s) in 4 weeks. Approx:5 flight events.

7.75

Friday @ 14:00 - 2 time(s) in 4 weeks. Approx:4 flight events.

6.25

Saturday @ 22:00 - 2 time(s) in 4 weeks. Approx:4 flight events.