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

29/03/2022 19:04:34

UK Postcode

VERULAM-PARK , HERTFORDSHIRE , AL3 4QL

Baseline geo-coordinates

51.753 , -0.347249

Survey type

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

Assessment band

OCCASIONAL

Assessment actual value

5.03

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

1,101 / 35.5 / 2.1 ✔

Flights above 26k feet.

221 / 7.1 / 0.4 ✔

Flights between 16k and 26k feet

346 / 11.2 / 0.7 ❌ (306)

Flights between 13k and 15k feet

54 / 1.7 / 0.1 ✔

Flights between 7k and 12k feet

328 / 10.6 / 0.6 ✔

Flights between 6k and 7k feet

51 / 1.6 / 0.1 ✔

Flights between 5k and 6k feet

31 / 1.0 / 0.1 ✔

Flights between 4k and 5k feet

8 / 0.3 / 0.0 ✔

Flights between 3k and 4k feet

0 ✔

Flights below 3k feet

62 / 2.0 / 0.1 ✔

4 or more flights per hour

47 / 1.5 ✔

9 or more flights per hour

0 / 0.0 ✔

Departures between 1.5k and 15k feet

354 / 11.4 / 0.7 ✔

Time and Sleep Analysis

For Assessment / Daily Avg. / Hourly Avg.

0 AM

11 / 0.4

1 AM

17 / 0.5

2 AM

6 / 0.2

3 AM

8 / 0.3

4 AM

14 / 0.5

5 AM

7 / 0.2

6 AM

47 / 1.5

7 AM

47 / 1.5

8 AM to 9 PM

855 / 27.6 / 2.0

10 PM

34 / 1.1

11 PM

27 / 0.9

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

49 ❌ (42)

Minimum avg. distance in miles

0.46

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

9.0 / 4.0 / 0.5 ✔

Flight holding stack identified?

No

Altitude for all flights

18,676 ✔

Altitude of departures between 1.5k and 15k feet

9,799 ✔

Altitude of flights below 20k feet

9,319 ✔

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

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

5.67

Sunday @ 14:00 - 3 time(s) in 4 weeks. Approx:3 flight events.

4.67

Sunday @ 10:00 - 3 time(s) in 4 weeks. Approx:3 flight events.

4.17

Friday @ 12:00 - 3 time(s) in 4 weeks. Approx:2 flight events.

4.00

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

3.67

Tuesday @ 15:00 - 3 time(s) in 4 weeks. Approx:2 flight events.

3.50

Sunday @ 12:00 - 3 time(s) in 4 weeks. Approx:2 flight events.

3.33

Tuesday @ 11:00 - 3 time(s) in 4 weeks. Approx:2 flight events.