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

07/05/2024 07:34:15

UK Postcode

GIPSY-HILL-0823 , LONDON , SE19 1QL

Baseline geo-coordinates

51.425 , -0.084102

Survey type

31 days prior to: 01-Sep-2023 @23:27:49

Assessment band

REGULAR

Assessment actual value

7.30

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

1,813 / 58.5 / 3.4 ✔

Flights above 26k feet.

593 / 19.1 / 1.1 ✔

Flights between 16k and 26k feet

129 / 4.2 / 0.2 ✔

Flights between 13k and 15k feet

80 / 2.6 / 0.2 ✔

Flights between 7k and 12k feet

100 / 3.2 / 0.2 ✔

Flights between 6k and 7k feet

118 / 3.8 / 0.2 ✔

Flights between 5k and 6k feet

292 / 9.4 / 0.6 ❌ (229)

Flights between 4k and 5k feet

395 / 12.7 / 0.7 ❌ (266)

Flights between 3k and 4k feet

73 / 2.4 / 0.1 ✔

Flights below 3k feet

33 / 1.1 / 0.1 ✔

4 or more flights per hour

115 / 3.7 ✔

9 or more flights per hour

9 / 0.3 ✔

Departures between 1.5k and 15k feet

240 / 7.7 / 0.5 ✔

Time and Sleep Analysis

For Assessment / Daily Avg. / Hourly Avg.

Between Midnight and 1am

14 / 0.5

Between 1am and 2am

17 / 0.5

Between 2am and 3am

10 / 0.3

Between 3am and 4am

10 / 0.3

Between 4am and 5am

24 / 0.8

Between 5am and 6am

62 / 2.0

Between 6am and 7am

88 / 2.8

Between 7am and 8am

117 / 3.8

Between 8am and 9pm

1,290 / 41.6 / 3.0

Between 10pm and 11pm

115 / 3.7

Between 11pm and Midnight

40 / 1.3

Other Noise Disturbance, Vibration and Emissions factors

Avg time in seconds an aircraft remained in the airspace bubble

18 ✔

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

55 ❌ (44)

Minimum avg. distance in miles

0.49

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

32.0 / 18.0 / 1.7 ✔

Flight holding stack identified?

No

Altitude for all flights

16,470 ❌ (17,612)

Altitude of departures between 1.5k and 15k feet

8,458 ✔

Altitude of flights below 20k feet

6,945 ❌ (8,792)

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

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

9.50

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

8.20

Thursdays between 21:00 and 22:00 - 4 time(s) in 4 weeks. Approx:5 flight events.

7.30

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

5.90

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

8.00

Thursdays between 10:00 and 11:00 - 4 time(s) in 4 weeks. Approx:5 flight events.

7.50

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

7.25

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

7.13

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