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

21/09/2021 18:46:07

UK Postcode

MERROW , SURREY , GU4 7EH

Baseline geo-coordinates

51.2526 , -0.529282

Survey type

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

Assessment band

REGULAR

Assessment actual value

10.11

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

2,559 / 82.5 / 4.9 ❌ (1,863)

Flights above 26k feet.

556 / 17.9 / 1.1 ❌ (382)

Flights between 16k and 26k feet

149 / 4.8 / 0.3 ✔

Flights between 13k and 15k feet

30 / 1.0 / 0.1 ✔

Flights between 7k and 12k feet

1,401 / 45.2 / 2.7 ❌ (227)

Flights between 6k and 7k feet

44 / 1.4 / 0.1 ✔

Flights between 5k and 6k feet

35 / 1.1 / 0.1 ✔

Flights between 4k and 5k feet

2 / 0.1 / 0.0 ✔

Flights between 3k and 4k feet

40 / 1.3 / 0.1 ✔

Flights below 3k feet

302 / 9.7 / 0.6 ✔

4 or more flights per hour

241 / 7.8 ❌ (127)

9 or more flights per hour

43 / 1.4 ✔

Departures between 1.5k and 15k feet

609 / 19.6 / 1.2 ❌ (238)

Time and Sleep Analysis

For Assessment / Daily Avg. / Hourly Avg.

0 AM

6 / 0.2

1 AM

6 / 0.2

2 AM

3 / 0.1

3 AM

8 / 0.3

4 AM

11 / 0.4

5 AM

24 / 0.8

6 AM

95 / 3.1

7 AM

131 / 4.2

8 AM to 9 PM

2,160 / 69.7 / 5.0

10 PM

61 / 2.0

11 PM

13 / 0.4

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

44 ❌ (41)

Minimum avg. distance in miles

0.44

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

56.0 / 25.0 / 2.9 ❌ (42)

Flight holding stack identified?

No

Altitude for all flights

14,679 ❌ (16,104)

Altitude of departures between 1.5k and 15k feet

9,783 ✔

Altitude of flights below 20k feet

8,385 ✔

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

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

13.40

Sunday @ 16:00 - 4 time(s) in 4 weeks. Approx:8 flight events.

13.10

Sunday @ 13:00 - 4 time(s) in 4 weeks. Approx:8 flight events.

12.90

Sunday @ 17:00 - 4 time(s) in 4 weeks. Approx:8 flight events.

12.70

Sunday @ 14:00 - 4 time(s) in 4 weeks. Approx:8 flight events.

12.10

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

9.50

Monday @ 15:00 - 4 time(s) in 4 weeks. Approx:6 flight events.

9.20

Tuesday @ 15:00 - 4 time(s) in 4 weeks. Approx:7 flight events.

9.10

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

8.10

Sunday @ 11:00 - 4 time(s) in 4 weeks. Approx:5 flight events.