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

22/04/2022 18:36:48

UK Postcode

TWYFORD-WINCHESTER , HAMPSHIRE , SO21 1QY

Baseline geo-coordinates

51.0194 , -1.31423

Survey type

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

Assessment band

OCCASIONAL

Assessment actual value

5.69

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

1,724 / 55.6 / 3.3 ✔

Flights above 26k feet.

719 / 23.2 / 1.4 ❌ (635)

Flights between 16k and 26k feet

471 / 15.2 / 0.9 ❌ (308)

Flights between 13k and 15k feet

95 / 3.1 / 0.2 ✔

Flights between 7k and 12k feet

88 / 2.8 / 0.2 ✔

Flights between 6k and 7k feet

21 / 0.7 / 0.0 ✔

Flights between 5k and 6k feet

6 / 0.2 / 0.0 ✔

Flights between 4k and 5k feet

14 / 0.5 / 0.0 ✔

Flights between 3k and 4k feet

82 / 2.6 / 0.2 ✔

Flights below 3k feet

228 / 7.4 / 0.4 ✔

4 or more flights per hour

64 / 2.1 ✔

9 or more flights per hour

0 / 0.0 ✔

Departures between 1.5k and 15k feet

193 / 6.2 / 0.4 ✔

Time and Sleep Analysis

For Assessment / Daily Avg. / Hourly Avg.

0 AM

5 / 0.2

1 AM

1 / 0.0

2 AM

3 AM

4 / 0.1

4 AM

4 / 0.1

5 AM

8 / 0.3

6 AM

78 / 2.5

7 AM

151 / 4.9

8 AM to 9 PM

1,395 / 45.0 / 3.2

10 PM

21 / 0.7

11 PM

22 / 0.7

Other Noise Disturbance, Vibration and Emissions factors

Time in seconds an aircraft existed in the airspace bubble

19 ✔

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

29 ✔

Minimum avg. distance in miles

0.39

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

19.0 / 6.0 / 1.0 ✔

Flight holding stack identified?

No

Altitude for all flights

20,991 ✔

Altitude of departures between 1.5k and 15k feet

5,868 ❌ (7,643)

Altitude of flights below 20k feet

10,529 ✔

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

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

6.75

Sunday @ 12:00 - 4 time(s) in 4 weeks. Approx:5 flight events.

6.13

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

5.63

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

5.50

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

5.38

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

5.13

Tuesday @ 8:00 - 4 time(s) in 4 weeks. Approx:3 flight events.

4.75

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

4.50

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