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

11/10/2021 07:49:02

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

5.42

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

1,536 / 49.5 / 2.9 ❌ (1,128)

Flights above 26k feet.

680 / 21.9 / 1.3 ❌ (218)

Flights between 16k and 26k feet

281 / 9.1 / 0.5 ❌ (113)

Flights between 13k and 15k feet

64 / 2.1 / 0.1 ❌ (48)

Flights between 7k and 12k feet

68 / 2.2 / 0.1 ✔

Flights between 6k and 7k feet

11 / 0.4 / 0.0 ✔

Flights between 5k and 6k feet

9 / 0.3 / 0.0 ✔

Flights between 4k and 5k feet

10 / 0.3 / 0.0 ✔

Flights between 3k and 4k feet

57 / 1.8 / 0.1 ✔

Flights below 3k feet

356 / 11.5 / 0.7 ❌ (207)

4 or more flights per hour

60 / 1.9 ✔

9 or more flights per hour

0 / 0.0 ✔

Departures between 1.5k and 15k feet

139 / 4.5 / 0.3 ✔

Time and Sleep Analysis

For Assessment / Daily Avg. / Hourly Avg.

0 AM

3 / 0.1

1 AM

2 / 0.1

2 AM

1 / 0.0

3 AM

3 / 0.1

4 AM

1 / 0.0

5 AM

6 / 0.2

6 AM

71 / 2.3

7 AM

179 / 5.8

8 AM to 9 PM

1,230 / 39.7 / 2.8

10 PM

6 / 0.2

11 PM

8 / 0.3

Other Noise Disturbance, Vibration and Emissions factors

Time in seconds an aircraft existed in the airspace bubble

23 ❌ (21)

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

42 ❌ (41)

Minimum avg. distance in miles

0.37

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

17.0 / 7.0 / 0.9 ✔

Flight holding stack identified?

No

Altitude for all flights

20,154 ✔

Altitude of departures between 1.5k and 15k feet

5,897 ❌ (7,830)

Altitude of flights below 20k feet

7,464 ❌ (7,528)

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

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

3.50

Sunday @ 16:00 - 4 time(s) in 4 weeks. Approx:2 flight events.

7.50

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

7.38

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

6.38

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

5.88

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

5.63

Sunday @ 9:00 - 4 time(s) in 4 weeks. Approx:3 flight events.

5.50

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

4.75

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