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

05/02/2025 11:57:49

UK Postcode

HENFIELD , WEST SUSSEX , BN5 9EQ

Baseline geo-coordinates

50.931 , -0.272263

Survey type

31 days prior to: 01-Sep-2024 @00:07:41

Assessment band

REGULAR

Assessment actual value

10.36

Assessment description

Will encounter some night-time and day-time noise disturbances that are caused by high volumes of planes flying at at low altitude. Also expect a visual impact too.

Band range

Lower: 7.0 --> Upper: 12.0

Volumes, Height bands, and Intensity.

For Assessment / Daily Avg. / Hourly Avg.

Count of ALL flights

3,693 / 119.1 / 7.0 ❌ (3,171)

Flights above 26k feet.

698 / 22.5 / 1.3 ✔

Flights between 16k and 26k feet

504 / 16.3 / 1.0 ❌ (355)

Flights between 13k and 15k feet

128 / 4.1 / 0.2 ✔

Flights between 7k and 12k feet

2,243 / 72.4 / 4.3 ❌ (544)

Flights between 6k and 7k feet

29 / 0.9 / 0.1 ✔

Flights between 5k and 6k feet

1 / 0.0 / 0.0 ✔

Flights between 4k and 5k feet

0 ✔

Flights between 3k and 4k feet

2 / 0.1 / 0.0 ✔

Flights below 3k feet

88 / 2.8 / 0.2 ✔

4 or more flights per hour

348 / 11.2 ❌ (202)

9 or more flights per hour

105 / 3.4 ❌ (76)

Departures between 1.5k and 15k feet

192 / 6.2 / 0.4 ✔

Time and Sleep Analysis

For Assessment / Daily Avg. / Hourly Avg.

Between Midnight and 1am

52 / 1.7

Between 1am and 2am

14 / 0.5

Between 2am and 3am

9 / 0.3

Between 3am and 4am

15 / 0.5

Between 4am and 5am

12 / 0.4

Between 5am and 6am

28 / 0.9

Between 6am and 7am

135 / 4.4

Between 7am and 8am

262 / 8.5

Between 8am and 9pm

2,908 / 93.8 / 6.7

Between 10pm and 11pm

118 / 3.8

Between 11pm and Midnight

120 / 3.9

Other Noise Disturbance, Vibration and Emissions factors

Avg time in seconds an aircraft remained in the airspace bubble

95 ❌ (31)

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

47 ❌ (43)

Minimum avg. distance in miles

0.45

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

86.0 / 41.0 / 4.5 ❌ (67)

Flight holding stack identified?

Yes ❌

Altitude for all flights

15,611 ❌ (17,529)

Altitude of departures between 1.5k and 15k feet

12,323 ✔

Altitude of flights below 20k feet

10,598 ✔

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

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

13.10

Thursdays between 9:00 and 10:00- 4 time(s) in 4 weeks. Approx:9 flight events.

12.10

Saturdays between 9:00 and 10:00- 4 time(s) in 4 weeks. Approx:8 flight events.

11.70

Thursdays between 13:00 and 14:00 - 4 time(s) in 4 weeks. Approx:9 flight events.

11.50

Saturdays between 12:00 and 13:00 - 4 time(s) in 4 weeks. Approx:8 flight events.

10.30

Thursdays between 16:00 and 17:00 - 4 time(s) in 4 weeks. Approx:7 flight events.

9.90

Saturdays between 14:00 and 15:00 - 4 time(s) in 4 weeks. Approx:7 flight events.

9.70

Wednesdays between 8:00 and 9:00- 4 time(s) in 4 weeks. Approx:7 flight events.