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

12/06/2023 12:26:37

UK Postcode

STONELEIGH-EPSOM , SURREY , KT19 0ST

Baseline geo-coordinates

51.3671 , -0.257891

Survey type

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

Assessment band

REGULAR

Assessment actual value

9.08

Assessment description

Sound equates to a "B" road or busy "C" road i.e. regular traffic that will be noticeable at peak times which includes evenings and weekends. Location is on a secondary flight corridor or flight route or in a flight holding stack area. At times there will be multiple flight occurrences within the same hour, typically 4. Some of the flights will be below 7000 feet.

Band range

Lower: 7.0 --> Upper: 12.0

Volumes, Height bands, and Intensity.

For Assessment / Daily Avg. / Hourly Avg.

Count of ALL flights

2,386 / 77.0 / 4.5 ✔

Flights above 26k feet.

473 / 15.3 / 0.9 ✔

Flights between 16k and 26k feet

1,074 / 34.6 / 2.0 ❌ (292)

Flights between 13k and 15k feet

91 / 2.9 / 0.2 ✔

Flights between 7k and 12k feet

507 / 16.4 / 1.0 ❌ (451)

Flights between 6k and 7k feet

206 / 6.6 / 0.4 ❌ (201)

Flights between 5k and 6k feet

27 / 0.9 / 0.1 ✔

Flights between 4k and 5k feet

2 / 0.1 / 0.0 ✔

Flights between 3k and 4k feet

2 / 0.1 / 0.0 ✔

Flights below 3k feet

4 / 0.1 / 0.0 ✔

4 or more flights per hour

218 / 7.0 ❌ (214)

9 or more flights per hour

25 / 0.8 ✔

Departures between 1.5k and 15k feet

25 / 0.8 / 0.0 ✔

Time and Sleep Analysis

For Assessment / Daily Avg. / Hourly Avg.

0 AM

26 / 0.8

1 AM

13 / 0.4

2 AM

8 / 0.3

3 AM

9 / 0.3

4 AM

13 / 0.4

5 AM

29 / 0.9

6 AM

126 / 4.1

7 AM

177 / 5.7

8 AM to 9 PM

1,815 / 58.5 / 4.2

10 PM

83 / 2.7

11 PM

61 / 2.0

Other Noise Disturbance, Vibration and Emissions factors

Time in seconds an aircraft existed in the airspace bubble

16 ✔

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

48 ❌ (41)

Minimum avg. distance in miles

0.49

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

52.0 / 25.0 / 2.7 ✔

Flight holding stack identified?

No

Altitude for all flights

17,583 ✔

Altitude of departures between 1.5k and 15k feet

9,467 ✔

Altitude of flights below 20k feet

13,374 ✔

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

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

8.90

Monday @ 10:00 - 4 time(s) in 4 weeks. Approx:6 flight events.

8.70

Sunday @ 14:00 - 4 time(s) in 4 weeks. Approx:6 flight events.

8.20

Sunday @ 22:00 - 4 time(s) in 4 weeks. Approx:5 flight events.

7.50

Sunday @ 7:00 - 4 time(s) in 4 weeks. Approx:5 flight events.

5.80

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

3.90

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

11.88

Monday @ 9:00 - 4 time(s) in 4 weeks. Approx:7 flight events.

11.63

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