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

28/06/2022 06:57:30

UK Postcode

WOOLMER-GREEN , HERTFORDSHIRE , AL6 0ET

Baseline geo-coordinates

51.8327 , -0.173203

Survey type

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

Assessment band

REGULAR

Assessment actual value

10.63

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

2,925 / 94.4 / 5.6 ✔

Flights above 26k feet.

1,029 / 33.2 / 2.0 ❌ (630)

Flights between 16k and 26k feet

331 / 10.7 / 0.6 ❌ (292)

Flights between 13k and 15k feet

46 / 1.5 / 0.1 ✔

Flights between 7k and 12k feet

546 / 17.6 / 1.0 ❌ (451)

Flights between 6k and 7k feet

346 / 11.2 / 0.7 ❌ (201)

Flights between 5k and 6k feet

345 / 11.1 / 0.7 ❌ (324)

Flights between 4k and 5k feet

222 / 7.2 / 0.4 ✔

Flights between 3k and 4k feet

11 / 0.4 / 0.0 ✔

Flights below 3k feet

49 / 1.6 / 0.1 ✔

4 or more flights per hour

213 / 6.9 ✔

9 or more flights per hour

33 / 1.1 ✔

Departures between 1.5k and 15k feet

1,225 / 39.5 / 2.3 ❌ (453)

Time and Sleep Analysis

For Assessment / Daily Avg. / Hourly Avg.

0 AM

61 / 2.0

1 AM

28 / 0.9

2 AM

19 / 0.6

3 AM

12 / 0.4

4 AM

3 / 0.1

5 AM

13 / 0.4

6 AM

84 / 2.7

7 AM

157 / 5.1

8 AM to 9 PM

2,282 / 73.6 / 5.3

10 PM

138 / 4.5

11 PM

92 / 3.0

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

55 ❌ (41)

Minimum avg. distance in miles

0.45

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

45.0 / 25.0 / 2.4 ✔

Flight holding stack identified?

No

Altitude for all flights

19,023 ✔

Altitude of departures between 1.5k and 15k feet

7,039 ❌ (7,444)

Altitude of flights below 20k feet

7,319 ❌ (8,037)

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

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

7.80

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

14.63

Wednesday @ 9:00 - 4 time(s) in 4 weeks. Approx:8 flight events.

12.25

Thursday @ 14:00 - 4 time(s) in 4 weeks. Approx:7 flight events.

10.13

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

9.88

Sunday @ 20:00 - 4 time(s) in 4 weeks. Approx:6 flight events.

9.25

Sunday @ 14:00 - 4 time(s) in 4 weeks. Approx:5 flight events.

8.88

Thursday @ 9:00 - 4 time(s) in 4 weeks. Approx:5 flight events.