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

27/06/2022 19:16:59

UK Postcode

CHISWICK-THORNEY-HEDGE , LONDON , W4 5SB

Baseline geo-coordinates

51.4939 , -0.278337

Survey type

31 days prior to: 27-Jun-2022 @17:53:01

Assessment band

REGULAR

Assessment actual value

7.48

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

1,381 / 44.5 / 2.6 ✔

Flights above 26k feet.

550 / 17.7 / 1.0 ✔

Flights between 16k and 26k feet

376 / 12.1 / 0.7 ❌ (353)

Flights between 13k and 15k feet

299 / 9.6 / 0.6 ❌ (179)

Flights between 7k and 12k feet

83 / 2.7 / 0.2 ✔

Flights between 6k and 7k feet

5 / 0.2 / 0.0 ✔

Flights between 5k and 6k feet

13 / 0.4 / 0.0 ✔

Flights between 4k and 5k feet

14 / 0.5 / 0.0 ✔

Flights between 3k and 4k feet

2 / 0.1 / 0.0 ✔

Flights below 3k feet

39 / 1.3 / 0.1 ✔

4 or more flights per hour

58 / 1.9 ✔

9 or more flights per hour

6 / 0.2 ✔

Departures between 1.5k and 15k feet

12 / 0.4 / 0.0 ✔

Time and Sleep Analysis

For Assessment / Daily Avg. / Hourly Avg.

Between Midnight and 1am

40 / 1.3

Between 1am and 2am

42 / 1.4

Between 2am and 3am

16 / 0.5

Between 3am and 4am

11 / 0.4

Between 4am and 5am

8 / 0.3

Between 5am and 6am

13 / 0.4

Between 6am and 7am

34 / 1.1

Between 7am and 8am

63 / 2.0

Between 8am and 9pm

948 / 30.6 / 2.2

Between 10pm and 11pm

59 / 1.9

Between 11pm and Midnight

85 / 2.7

Other Noise Disturbance, Vibration and Emissions factors

Avg time in seconds an aircraft remained in the airspace bubble

16 ✔

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

49 ❌ (43)

Minimum avg. distance in miles

0.43

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

14.0 / 7.0 / 0.7 ✔

Flight holding stack identified?

No

Altitude for all flights

23,122 ✔

Altitude of departures between 1.5k and 15k feet

4,267 ❌ (8,452)

Altitude of flights below 20k feet

14,559 ✔

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

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

8.50

Thursdays between 12:00 and 13:00 - 3 time(s) in 4 weeks. Approx:6 flight events.

5.00

Tuesdays between 11:00 and 12:00 - 3 time(s) in 4 weeks. Approx:3 flight events.

3.67

Sundays between 12:00 and 13:00 - 3 time(s) in 4 weeks. Approx:3 flight events.

2.83

Saturdays between 17:00 and 18:00 - 3 time(s) in 4 weeks. Approx:2 flight events.

11.50

Fridays between 14:00 and 15:00 - 2 time(s) in 4 weeks. Approx:9 flight events.

11.00

Mondays between 11:00 and 12:00 - 2 time(s) in 4 weeks. Approx:8 flight events.

8.00

Sundays between 17:00 and 18:00 - 2 time(s) in 4 weeks. Approx:6 flight events.