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

22/09/2024 07:56:48

UK Postcode

BAYFORD-2M , HERTFORDSHIRE , SG13 8PY

Baseline geo-coordinates

51.7525 , -0.11278

Survey type

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

Assessment band

VERY HIGH

Assessment actual value

22.69

Assessment description

Highly likely to encounter both night-time and day-time noise disturbances that are caused by high volumes of planes flying at at low altitude. Also expect a visual impact too.

Band range

Lower: 20.0 --> Upper: 30.0

Volumes, Height bands, and Intensity.

For Assessment / Daily Avg. / Hourly Avg.

Count of ALL flights

12,616 / 407.0 / 23.9 ❌ (3,428)

Flights above 26k feet.

2,208 / 71.2 / 4.2 ❌ (724)

Flights between 16k and 26k feet

1,653 / 53.3 / 3.1 ❌ (325)

Flights between 13k and 15k feet

1,602 / 51.7 / 3.0 ❌ (161)

Flights between 7k and 12k feet

5,724 / 184.6 / 10.9 ❌ (500)

Flights between 6k and 7k feet

444 / 14.3 / 0.8 ❌ (169)

Flights between 5k and 6k feet

461 / 14.9 / 0.9 ❌ (265)

Flights between 4k and 5k feet

211 / 6.8 / 0.4 ✔

Flights between 3k and 4k feet

39 / 1.3 / 0.1 ✔

Flights below 3k feet

274 / 8.8 / 0.5 ✔

4 or more flights per hour

601 / 19.4 ❌ (218)

9 or more flights per hour

535 / 17.3 ❌ (91)

Departures between 1.5k and 15k feet

3,861 / 124.5 / 7.3 ❌ (420)

Time and Sleep Analysis

For Assessment / Daily Avg. / Hourly Avg.

0 AM

266 / 8.6

1 AM

132 / 4.3

2 AM

51 / 1.6

3 AM

39 / 1.3

4 AM

43 / 1.4

5 AM

75 / 2.4

6 AM

405 / 13.1

7 AM

638 / 20.6

8 AM to 9 PM

9,923 / 320.1 / 22.9

10 PM

553 / 17.8

11 PM

413 / 13.3

Other Noise Disturbance, Vibration and Emissions factors

Time in seconds an aircraft existed in the airspace bubble

35 ❌ (23)

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

48 ❌ (43)

Minimum avg. distance in miles

0.72

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

288.0 / 137.0 / 15.2 ❌ (78)

Flight holding stack identified?

Yes ❌

Altitude for all flights

16,366 ✔

Altitude of departures between 1.5k and 15k feet

8,940 ✔

Altitude of flights below 20k feet

10,567 ✔

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

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

34.50

Friday @ 16:00 - 4 time(s) in 4 weeks. Approx:25 flight events.

33.30

Friday @ 14:00 - 4 time(s) in 4 weeks. Approx:24 flight events.

32.50

Thursday @ 15:00 - 4 time(s) in 4 weeks. Approx:23 flight events.

32.40

Friday @ 17:00 - 4 time(s) in 4 weeks. Approx:23 flight events.

31.30

Thursday @ 16:00 - 4 time(s) in 4 weeks. Approx:23 flight events.

30.90

Friday @ 18:00 - 4 time(s) in 4 weeks. Approx:22 flight events.

29.30

Friday @ 15:00 - 4 time(s) in 4 weeks. Approx:21 flight events.

28.70

Thursday @ 11:00 - 4 time(s) in 4 weeks. Approx:20 flight events.

27.70

Thursday @ 17:00 - 4 time(s) in 4 weeks. Approx:19 flight events.