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

14/08/2022 08:06:01

UK Postcode

WALTON-HERSHAM , SURREY , KT12 1NR

Baseline geo-coordinates

51.373 , -0.414403

Survey type

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

Assessment band

INTERMITTENT

Assessment actual value

6.98

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

1,838 / 59.3 / 3.5 ✔

Flights above 26k feet.

466 / 15.0 / 0.9 ✔

Flights between 16k and 26k feet

251 / 8.1 / 0.5 ✔

Flights between 13k and 15k feet

54 / 1.7 / 0.1 ✔

Flights between 7k and 12k feet

825 / 26.6 / 1.6 ❌ (490)

Flights between 6k and 7k feet

112 / 3.6 / 0.2 ✔

Flights between 5k and 6k feet

79 / 2.5 / 0.1 ✔

Flights between 4k and 5k feet

26 / 0.8 / 0.0 ✔

Flights between 3k and 4k feet

6 / 0.2 / 0.0 ✔

Flights below 3k feet

19 / 0.6 / 0.0 ✔

4 or more flights per hour

116 / 3.7 ✔

9 or more flights per hour

11 / 0.4 ✔

Departures between 1.5k and 15k feet

240 / 7.7 / 0.5 ✔

Time and Sleep Analysis

For Assessment / Daily Avg. / Hourly Avg.

0 AM

19 / 0.6

1 AM

16 / 0.5

2 AM

12 / 0.4

3 AM

15 / 0.5

4 AM

13 / 0.4

5 AM

77 / 2.5

6 AM

112 / 3.6

7 AM

129 / 4.2

8 AM to 9 PM

1,292 / 41.7 / 3.0

10 PM

67 / 2.2

11 PM

56 / 1.8

Other Noise Disturbance, Vibration and Emissions factors

Time in seconds an aircraft existed in the airspace bubble

17 ✔

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

49 ❌ (43)

Minimum avg. distance in miles

0.47

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

35.0 / 17.0 / 1.8 ✔

Flight holding stack identified?

Yes ❌

Altitude for all flights

16,413 ✔

Altitude of departures between 1.5k and 15k feet

5,951 ❌ (7,941)

Altitude of flights below 20k feet

9,633 ✔

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

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

6.00

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

5.30

Sunday @ 6:00 - 4 time(s) in 4 weeks. Approx:4 flight events.

11.13

Tuesday @ 8:00 - 4 time(s) in 4 weeks. Approx:7 flight events.

9.88

Saturday @ 8:00 - 4 time(s) in 4 weeks. Approx:7 flight events.

9.00

Monday @ 8:00 - 4 time(s) in 4 weeks. Approx:7 flight events.

8.50

Monday @ 9:00 - 4 time(s) in 4 weeks. Approx:6 flight events.

8.25

Saturday @ 9:00 - 4 time(s) in 4 weeks. Approx:6 flight events.

7.88

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