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 10:20:53

UK Postcode

TWYFORD , HAMPSHIRE , SO21 1NH

Baseline geo-coordinates

51.0187 , -1.31499

Survey type

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

Assessment band

REGULAR

Assessment actual value

7.24

Assessment description

Will encounter some 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: 7.0 --> Upper: 12.0

Volumes, Height bands, and Intensity.

For Assessment / Daily Avg. / Hourly Avg.

Count of ALL flights

2,192 / 70.7 / 4.2 ✔

Flights above 26k feet.

760 / 24.5 / 1.4 ❌ (634)

Flights between 16k and 26k feet

595 / 19.2 / 1.1 ❌ (309)

Flights between 13k and 15k feet

190 / 6.1 / 0.4 ❌ (135)

Flights between 7k and 12k feet

114 / 3.7 / 0.2 ✔

Flights between 6k and 7k feet

11 / 0.4 / 0.0 ✔

Flights between 5k and 6k feet

11 / 0.4 / 0.0 ✔

Flights between 4k and 5k feet

23 / 0.7 / 0.0 ✔

Flights between 3k and 4k feet

82 / 2.6 / 0.2 ✔

Flights below 3k feet

406 / 13.1 / 0.8 ✔

4 or more flights per hour

165 / 5.3 ✔

9 or more flights per hour

10 / 0.3 ✔

Departures between 1.5k and 15k feet

275 / 8.9 / 0.5 ✔

Time and Sleep Analysis

For Assessment / Daily Avg. / Hourly Avg.

0 AM

8 / 0.3

1 AM

6 / 0.2

2 AM

2 / 0.1

3 AM

1 / 0.0

4 AM

2 / 0.1

5 AM

14 / 0.5

6 AM

91 / 2.9

7 AM

168 / 5.4

8 AM to 9 PM

1,811 / 58.4 / 4.2

10 PM

57 / 1.8

11 PM

8 / 0.3

Other Noise Disturbance, Vibration and Emissions factors

Time in seconds an aircraft existed in the airspace bubble

21 ✔

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

42 ✔

Minimum avg. distance in miles

0.39

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

35.0 / 14.0 / 1.8 ✔

Flight holding stack identified?

No

Altitude for all flights

18,939 ✔

Altitude of departures between 1.5k and 15k feet

7,324 ❌ (7,809)

Altitude of flights below 20k feet

10,155 ✔

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

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

11.88

Saturday @ 11:00 - 4 time(s) in 4 weeks. Approx:7 flight events.

11.25

Thursday @ 11:00 - 4 time(s) in 4 weeks. Approx:8 flight events.

9.00

Sunday @ 8:00 - 4 time(s) in 4 weeks. Approx:5 flight events.

8.88

Friday @ 9:00 - 4 time(s) in 4 weeks. Approx:5 flight events.

8.75

Saturday @ 10:00 - 4 time(s) in 4 weeks. Approx:5 flight events.

8.25

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

8.13

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

8.00

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