Assessment ScoreCard – 31 Day

Assessment Scorecard headlines

All Assessments are based on an ambient background noise of between 30 and 40 dBs i.e. a quiet residential area. Typically the noise from an overflying aircraft is between 50-65 dBs. If your property is located near to a busy road i.e. 70-75 dBs, the noise impact from aircraft will be significantly reduced, whilst the road remains busy.

Note: Overflying aircraft noise typically has a duration of 30-50 seconds, the higher the plane the longer the duration. Whereas the average car, bus or HGV the duration is only a few seconds.

Date of survey

20/10/2025 16:13:30

UK Postcode Area

PETTS-WOOD, LONDON, BR5 1BQ

Baseline geo-coordinates

51.3863 , 0.070293

Survey type

31 days prior to: 19-Oct-2025 @23:55:09

Assessment band

FREQUENT

Assessment actual value

12.38

Assessment description

Likely to encounter both 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: 12.0 --> Upper: 16.0

Volumes, Height bands, and Intensity.

For Assessment / Daily Avg. / Hourly Avg.

Count of ALL flights

4,514 / 145.6 / 8.6 ❌ (3,187)

Flights above 26k feet.

755 / 24.4 / 1.4 ✔

Flights between 16k and 26k feet

91 / 2.9 / 0.2 ✔

Flights between 13k and 15k feet

144 / 4.6 / 0.3 ✔

Flights between 7k and 12k feet

2,071 / 66.8 / 3.9 ❌ (560)

Flights between 6k and 7k feet

145 / 4.7 / 0.3 ✔

Flights between 5k and 6k feet

276 / 8.9 / 0.5 ❌ (224)

Flights between 4k and 5k feet

16 / 0.5 / 0.0 ✔

Flights between 3k and 4k feet

2 / 0.1 / 0.0 ✔

Flights below 3k feet

1,014 / 32.7 / 1.9 ❌ (556)

4 or more flights per hour

435 / 14.0 ❌ (206)

9 or more flights per hour

161 / 5.2 ❌ (77)

Departures between 1.5k and 15k feet

1,068 / 34.5 / 2.0 ❌ (399)

Time and Sleep Analysis

For Assessment / Daily Avg. / Hourly Avg.

Between Midnight and 1am

21 / 0.7

Between 1am and 2am

17 / 0.5

Between 2am and 3am

8 / 0.3

Between 3am and 4am

5 / 0.2

Between 4am and 5am

14 / 0.5

Between 5am and 6am

56 / 1.8

Between 6am and 7am

179 / 5.8

Between 7am and 8am

220 / 7.1

Between 8am and 9pm

3,652 / 117.8 / 8.4

Between 10pm and 11pm

195 / 6.3

Between 11pm and Midnight

80 / 2.6

Other Noise Disturbance, Vibration and Emissions factors

Avg time in seconds an aircraft remained in the airspace bubble

32 ❌ (30)

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

49 ❌ (43)

Minimum avg. distance in miles

0.43

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

118.0 / 58.0 / 6.2 ❌ (67)

Flight holding stack identified?

Yes ❌

Altitude for all flights

11,927 ❌ (17,615)

Altitude of departures between 1.5k and 15k feet

10,390 ✔

Altitude of flights below 20k feet

7,331 ❌ (8,784)

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

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

20.50

Sundays between 19:00 and 20:00 - 4 time(s) in 4 weeks. Approx:13 flight events.

17.10

Sundays between 16:00 and 17:00 - 4 time(s) in 4 weeks. Approx:10 flight events.

17.00

Sundays between 18:00 and 19:00 - 4 time(s) in 4 weeks. Approx:10 flight events.

16.60

Sundays between 20:00 and 21:00 - 4 time(s) in 4 weeks. Approx:10 flight events.

15.90

Fridays between 17:00 and 18:00 - 4 time(s) in 4 weeks. Approx:9 flight events.

15.80

Sundays between 12:00 and 13:00 - 4 time(s) in 4 weeks. Approx:10 flight events.

15.60

Sundays between 13:00 and 14:00 - 4 time(s) in 4 weeks. Approx:10 flight events.

15.00

Fridays between 15:00 and 16:00 - 4 time(s) in 4 weeks. Approx:9 flight events.