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

21/07/2022 13:35:00

UK Postcode

WORMLEY-WEST-END , HERTFORDSHIRE , EN10 7QN

Baseline geo-coordinates

51.7367 , -0.064533

Survey type

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

Assessment band

INTERMITTENT

Assessment actual value

5.70

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

2,396 / 77.3 / 4.5 ✔

Flights above 26k feet.

897 / 28.9 / 1.7 ❌ (720)

Flights between 16k and 26k feet

496 / 16.0 / 0.9 ❌ (324)

Flights between 13k and 15k feet

139 / 4.5 / 0.3 ✔

Flights between 7k and 12k feet

574 / 18.5 / 1.1 ❌ (490)

Flights between 6k and 7k feet

31 / 1.0 / 0.1 ✔

Flights between 5k and 6k feet

45 / 1.5 / 0.1 ✔

Flights between 4k and 5k feet

48 / 1.5 / 0.1 ✔

Flights between 3k and 4k feet

28 / 0.9 / 0.1 ✔

Flights below 3k feet

138 / 4.5 / 0.3 ✔

4 or more flights per hour

156 / 5.0 ✔

9 or more flights per hour

3 / 0.1 ✔

Departures between 1.5k and 15k feet

475 / 15.3 / 0.9 ❌ (413)

Time and Sleep Analysis

For Assessment / Daily Avg. / Hourly Avg.

0 AM

69 / 2.2

1 AM

54 / 1.7

2 AM

25 / 0.8

3 AM

15 / 0.5

4 AM

21 / 0.7

5 AM

10 / 0.3

6 AM

46 / 1.5

7 AM

106 / 3.4

8 AM to 9 PM

1,873 / 60.4 / 4.3

10 PM

79 / 2.5

11 PM

70 / 2.3

Other Noise Disturbance, Vibration and Emissions factors

Time in seconds an aircraft existed in the airspace bubble

16 ✔

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

45 ❌ (43)

Minimum avg. distance in miles

0.48

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

25.0 / 11.0 / 1.3 ✔

Flight holding stack identified?

No

Altitude for all flights

21,398 ✔

Altitude of departures between 1.5k and 15k feet

9,833 ✔

Altitude of flights below 20k feet

9,842 ✔

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

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

6.25

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

5.88

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

5.75

Tuesday @ 9:00 - 4 time(s) in 4 weeks. Approx:3 flight events.

4.88

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

4.63

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

4.25

Friday @ 12:00 - 4 time(s) in 4 weeks. Approx:3 flight events.

2.88

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