Assessment ScoreCard – 31 Day

Aircraft Traffic Assessment: 31 Day Scorecard



The symbol indicates the measure is better than the average when compared with other assessed
UK postcodes. The ❌ represents the opposite. Assessed averages are shown in brackets.

See: for a full explanation about the Assessment scorecard.

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 (76)

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 (182)

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 (7,778)

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.

Our scorecard is designed to provide a greater understanding how the assessment was reached for your selected UK post code. To enable you to validate our assessment we also provide up to 10 occurrences when we believe the disruption will be at its highest.

For those that would like to perform their own analysis we can also provide the low level flight data that includes the length of time a plane existed inside your select airspace bubble.



Flights by Airport (less than 1% are excluded): HARLESDEN NW10 4DY (LONDON)

UK Airport Count of Flights Percentage of Total
LONDON HEATHROW AIRPORT25147.3
LONDON STANSTED AIRPORT7213.6
NON UK AIRPORT6712.6
LONDON LUTON AIRPORT6111.5
FARNBOROUGH AIRPORT295.5
LONDON GATWICK AIRPORT122.3
LONDON CITY AIRPORT101.9
LONDON BIGGIN HILL AIRPORT71.3
ELSTREE AIRFIELD71.3

Flight evidence for location: ()

Event_date_time Event_date_time_hidden Call Sign ICAO24 UK Airport Direction Altitude (feet) Distance (miles) Airspace (seconds)
Event_date_time Event_date_time_hidden Call Sign ICAO24 Airport Direction Altitude (feet) Distance (miles) Airspace (seconds)