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

24/05/2024 09:48:37

UK Postcode

STEVENAGE , HERTFORDSHIRE , SG1 2EW

Baseline geo-coordinates

51.903 , -0.216024

Survey type

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

Assessment band

HIGH

Assessment actual value

19.75

Assessment description

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: 16.0 --> Upper: 20.0

Volumes, Height bands, and Intensity.

For Assessment / Daily Avg. / Hourly Avg.

Count of ALL flights

4,837 / 156.0 / 9.2 ❌ (3,399)

Flights above 26k feet.

326 / 10.5 / 0.6 ✔

Flights between 16k and 26k feet

123 / 4.0 / 0.2 ✔

Flights between 13k and 15k feet

114 / 3.7 / 0.2 ✔

Flights between 7k and 12k feet

481 / 15.5 / 0.9 ✔

Flights between 6k and 7k feet

19 / 0.6 / 0.0 ✔

Flights between 5k and 6k feet

122 / 3.9 / 0.2 ✔

Flights between 4k and 5k feet

817 / 26.4 / 1.6 ❌ (319)

Flights between 3k and 4k feet

863 / 27.8 / 1.6 ❌ (267)

Flights below 3k feet

1,972 / 63.6 / 3.7 ❌ (731)

4 or more flights per hour

463 / 14.9 ❌ (217)

9 or more flights per hour

240 / 7.7 ❌ (90)

Departures between 1.5k and 15k feet

2,308 / 74.5 / 4.4 ❌ (413)

Time and Sleep Analysis

For Assessment / Daily Avg. / Hourly Avg.

0 AM

81 / 2.6

1 AM

85 / 2.7

2 AM

48 / 1.5

3 AM

19 / 0.6

4 AM

37 / 1.2

5 AM

40 / 1.3

6 AM

246 / 7.9

7 AM

337 / 10.9

8 AM to 9 PM

3,589 / 115.8 / 8.3

10 PM

221 / 7.1

11 PM

119 / 3.8

Other Noise Disturbance, Vibration and Emissions factors

Time in seconds an aircraft existed in the airspace bubble

27 ❌ (23)

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

51 ❌ (43)

Minimum avg. distance in miles

0.35

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

140.0 / 71.0 / 7.4 ❌ (77)

Flight holding stack identified?

No

Altitude for all flights

6,837 ❌ (16,276)

Altitude of departures between 1.5k and 15k feet

5,798 ❌ (7,941)

Altitude of flights below 20k feet

4,376 ❌ (8,043)

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

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

30.50

Wednesday @ 9:00 - 4 time(s) in 4 weeks. Approx:15 flight events.

27.88

Wednesday @ 8:00 - 4 time(s) in 4 weeks. Approx:13 flight events.

27.63

Tuesday @ 8:00 - 4 time(s) in 4 weeks. Approx:13 flight events.

27.25

Friday @ 7:00 - 4 time(s) in 4 weeks. Approx:15 flight events.

26.00

Saturday @ 8:00 - 4 time(s) in 4 weeks. Approx:13 flight events.

25.75

Wednesday @ 16:00 - 4 time(s) in 4 weeks. Approx:12 flight events.

25.25

Friday @ 16:00 - 4 time(s) in 4 weeks. Approx:12 flight events.

24.13

Thursday @ 16:00 - 4 time(s) in 4 weeks. Approx:14 flight events.

24.00

Sunday @ 20:00 - 4 time(s) in 4 weeks. Approx:12 flight events.