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

14/01/2025 15:32:52

UK Postcode

CLARENCE-PARK-WEST-ST-ALBANS-JAN2025 , HERTFORDSHIRE , AL1 3RR

Baseline geo-coordinates

51.7543 , -0.334225

Survey type

31 days prior to: 13-Jan-2025 @23:26:23

Assessment band

INTERMITTENT

Assessment actual value

5.05

Assessment description

Will encounter some day-time noise disturbances that are caused by the volumes of planes overflying Also expect a possible visual impact too.

Band range

Lower: 4.0 --> Upper: 7.0

Volumes, Height bands, and Intensity.

For Assessment / Daily Avg. / Hourly Avg.

Count of ALL flights

1,120 / 36.1 / 2.1 ✔

Flights above 26k feet.

311 / 10.0 / 0.6 ✔

Flights between 16k and 26k feet

379 / 12.2 / 0.7 ❌ (350)

Flights between 13k and 15k feet

75 / 2.4 / 0.1 ✔

Flights between 7k and 12k feet

272 / 8.8 / 0.5 ✔

Flights between 6k and 7k feet

29 / 0.9 / 0.1 ✔

Flights between 5k and 6k feet

11 / 0.4 / 0.0 ✔

Flights between 4k and 5k feet

6 / 0.2 / 0.0 ✔

Flights between 3k and 4k feet

0 ✔

Flights below 3k feet

37 / 1.2 / 0.1 ✔

4 or more flights per hour

44 / 1.4 ✔

9 or more flights per hour

1 / 0.0 ✔

Departures between 1.5k and 15k feet

210 / 6.8 / 0.4 ✔

Time and Sleep Analysis

For Assessment / Daily Avg. / Hourly Avg.

Between Midnight and 1am

9 / 0.3

Between 1am and 2am

1 / 0.0

Between 2am and 3am

6 / 0.2

Between 3am and 4am

6 / 0.2

Between 4am and 5am

10 / 0.3

Between 5am and 6am

7 / 0.2

Between 6am and 7am

44 / 1.4

Between 7am and 8am

45 / 1.5

Between 8am and 9pm

886 / 28.6 / 2.0

Between 10pm and 11pm

67 / 2.2

Between 11pm and Midnight

24 / 0.8

Other Noise Disturbance, Vibration and Emissions factors

Avg time in seconds an aircraft remained in the airspace bubble

20 ✔

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

65 ❌ (43)

Minimum avg. distance in miles

0.51

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

7.0 / 5.0 / 0.4 ✔

Flight holding stack identified?

No

Altitude for all flights

21,091 ✔

Altitude of departures between 1.5k and 15k feet

10,432 ✔

Altitude of flights below 20k feet

10,763 ✔

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

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

5.38

Sundays between 17:00 and 18:00 - 4 time(s) in 4 weeks. Approx:4 flight events.

5.33

Sundays between 22:00 and 23:00 - 3 time(s) in 4 weeks. Approx:4 flight events.

5.00

Mondays between 21:00 and 22:00 - 3 time(s) in 4 weeks. Approx:3 flight events.

4.50

Mondays between 22:00 and 23:00 - 3 time(s) in 4 weeks. Approx:3 flight events.

3.33

Saturdays between 14:00 and 15:00 - 3 time(s) in 4 weeks. Approx:2 flight events.

2.67

Saturdays between 13:00 and 14:00 - 3 time(s) in 4 weeks. Approx:2 flight events.

7.25

Sundays between 20:00 and 21:00 - 2 time(s) in 4 weeks. Approx:5 flight events.

6.00

Saturdays between 11:00 and 12:00 - 2 time(s) in 4 weeks. Approx:4 flight events.

5.25

Mondays between 18:00 and 19:00 - 2 time(s) in 4 weeks. Approx:4 flight events.