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

26/04/2023 10:13:15

UK Postcode

CENTRAL-CHELMSFORD , ESSEX , CM2 9XQ

Baseline geo-coordinates

51.7235 , 0.460182

Survey type

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

Assessment band

INTERMITTENT

Assessment actual value

4.99

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

1,414 / 45.6 / 2.7 ✔

Flights above 26k feet.

751 / 24.2 / 1.4 ❌ (651)

Flights between 16k and 26k feet

239 / 7.7 / 0.5 ✔

Flights between 13k and 15k feet

33 / 1.1 / 0.1 ✔

Flights between 7k and 12k feet

262 / 8.5 / 0.5 ✔

Flights between 6k and 7k feet

25 / 0.8 / 0.0 ✔

Flights between 5k and 6k feet

11 / 0.4 / 0.0 ✔

Flights between 4k and 5k feet

5 / 0.2 / 0.0 ✔

Flights between 3k and 4k feet

5 / 0.2 / 0.0 ✔

Flights below 3k feet

83 / 2.7 / 0.2 ✔

4 or more flights per hour

26 / 0.8 ✔

9 or more flights per hour

0 / 0.0 ✔

Departures between 1.5k and 15k feet

235 / 7.6 / 0.4 ✔

Time and Sleep Analysis

For Assessment / Daily Avg. / Hourly Avg.

0 AM

15 / 0.5

1 AM

11 / 0.4

2 AM

13 / 0.4

3 AM

5 / 0.2

4 AM

10 / 0.3

5 AM

11 / 0.4

6 AM

39 / 1.3

7 AM

54 / 1.7

8 AM to 9 PM

1,140 / 36.8 / 2.6

10 PM

61 / 2.0

11 PM

30 / 1.0

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

38 ✔

Minimum avg. distance in miles

0.48

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

9.0 / 3.0 / 0.5 ✔

Flight holding stack identified?

No

Altitude for all flights

24,050 ✔

Altitude of departures between 1.5k and 15k feet

8,508 ✔

Altitude of flights below 20k feet

10,220 ✔

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

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

5.17

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

4.83

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

4.50

Sunday @ 19:00 - 3 time(s) in 4 weeks. Approx:4 flight events.

3.17

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

3.00

Friday @ 10:00 - 3 time(s) in 4 weeks. Approx:2 flight events.

2.83

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

8.25

Thursday @ 19:00 - 2 time(s) in 4 weeks. Approx:6 flight events.

8.00

Tuesday @ 19:00 - 2 time(s) in 4 weeks. Approx:5 flight events.