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

01/12/2025 23:37:16

UK Postcode Area

ELTHAM-NORTH-0825, LONDON, SE9 1YA

Baseline geo-coordinates

51.463 , 0.057437

Survey type

31 days prior to: 01-Sep-2025 @23:44:50

Assessment band

INTERMITTENT

Assessment actual value

6.94

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

2,050 / 66.1 / 3.9 ✔

Flights above 26k feet.

1,147 / 37.0 / 2.2 ❌ (761)

Flights between 16k and 26k feet

158 / 5.1 / 0.3 ✔

Flights between 13k and 15k feet

59 / 1.9 / 0.1 ✔

Flights between 7k and 12k feet

34 / 1.1 / 0.1 ✔

Flights between 6k and 7k feet

128 / 4.1 / 0.2 ✔

Flights between 5k and 6k feet

350 / 11.3 / 0.7 ❌ (231)

Flights between 4k and 5k feet

137 / 4.4 / 0.3 ✔

Flights between 3k and 4k feet

7 / 0.2 / 0.0 ✔

Flights below 3k feet

30 / 1.0 / 0.1 ✔

4 or more flights per hour

72 / 2.3 ✔

9 or more flights per hour

4 / 0.1 ✔

Departures between 1.5k and 15k feet

38 / 1.2 / 0.1 ✔

Time and Sleep Analysis

For Assessment / Daily Avg. / Hourly Avg.

Between Midnight and 1am

36 / 1.2

Between 1am and 2am

26 / 0.8

Between 2am and 3am

21 / 0.7

Between 3am and 4am

30 / 1.0

Between 4am and 5am

78 / 2.5

Between 5am and 6am

131 / 4.2

Between 6am and 7am

128 / 4.1

Between 7am and 8am

116 / 3.7

Between 8am and 9pm

1,298 / 41.9 / 3.0

Between 10pm and 11pm

60 / 1.9

Between 11pm and Midnight

44 / 1.4

Other Noise Disturbance, Vibration and Emissions factors

Avg time in seconds an aircraft remained in the airspace bubble

17 ✔

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

63 ❌ (44)

Minimum avg. distance in miles

0.47

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

20.0 / 13.0 / 1.1 ✔

Flight holding stack identified?

No

Altitude for all flights

23,540 ✔

Altitude of departures between 1.5k and 15k feet

13,271 ✔

Altitude of flights below 20k feet

7,620 ❌ (8,770)

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

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

9.83

Saturdays between 19:00 and 20:00 - 3 time(s) in 4 weeks. Approx:6 flight events.

8.83

Thursdays between 5:00 and 6:00- 3 time(s) in 4 weeks. Approx:5 flight events.

8.50

Saturdays between 6:00 and 7:00- 3 time(s) in 4 weeks. Approx:4 flight events.

7.67

Fridays between 5:00 and 6:00- 3 time(s) in 4 weeks. Approx:5 flight events.

6.17

Sundays between 6:00 and 7:00- 3 time(s) in 4 weeks. Approx:4 flight events.

6.00

Thursdays between 17:00 and 18:00 - 3 time(s) in 4 weeks. Approx:3 flight events.

5.17

Sundays between 8:00 and 9:00- 3 time(s) in 4 weeks. Approx:3 flight events.

4.83

Fridays between 18:00 and 19:00 - 3 time(s) in 4 weeks. Approx:3 flight events.