2019 COMMENTS
COMMENTS 5/5/2020
Data recorded during 2019 show very close correlation with the overall data recorded in previous years with the Lazenby noise levels remaining at the lowest level for several decades.
The majority of incidents captured during December were the result of off site noise - emergency vehicles, boy racers, some domestic noise and fireworks at the turn of year but there were a number of short incidents which appeared to emanate from Wilton Site. Horn 12/12/19 ~ 23:35. Vent 24/12/19 ~ 02:35. Alarm 31/12/19 ~ 23:15. Short audio recordings are available on the web site.
COMMENTS 1/12/2019
Event audio recordings now being received by email. Short event (vent noise) picked up at 02:08 on the 14th November.
The noise level distribution curves indicate a small increase in the noise levels at Lazenby which is almost certainly a result of the excessive rain that has occurred during the month. (Note that noise from high wind is more readily identified on the traces and this data is excluded.)
COMMENTS 4/11/2019
The Lazenby Noise Monitor has been returned to service and is successfully recording and sending noise data although Google Mail had been blocking attempts to send email alerts/audio files in response to events. This has resulted from maintenance on the monitor which led to a number of IP address changes which Google identified as different devices and therefore suspicious The Google Mail settings have now been changed and hopefully the problem has been resolved.
The cumulative distribution curves continue to confirm the historically low level of noise at Lazenby Village.
COMMENTS 4/8/2019
Unfortunately power was removed from the monitor during July. The unit ran for some time on battery but the voltage drop caused the modem to shut down and communication was lost. During the failure investigation, the monitor displayed temperamental erratic behaviour the source of which could not be identifed, however, the monitor has been returned to service to cover the Olefins start up.
It is now believed that the monitor problems are associated with the remote calibration system which is incorporated in the microphone preamplifier. Once Olefins is back in normal operation the monitor will be removed again and the preamplifier replaced.
The limited data acquired during July was consistently low and there were no changes in the cumulative distribution curves. Wilton Site was not responsible for any of the events flagged up by the monitor.
COMMENTS 7/7/2019
The time traces show an incident that started on the 1st July at 00:00 hours rising by 10 dB over 45 minutes and then stopping suddenly. The gradual increase in level failed to trigger an event on the monitor. There was the usual triggering of extraneous noise during the month but nothing which could be associated with Wilton Site.
Overall levels remain low.
COMMENTS 2/6/19
All short incidents that triggered the Noise Monitor related to non-site events - vehicles, dogs, emergency services. There were however several lengthy periods of elevated noise levels which probably originated from Wilton Site. These periods were characterized by a sudden rise or fall in the ambient noise level - typically about 10 dB.
COMMENTS 5/5/19
Whilst, for the most part, overall levels at Lazenby remain low there were several periods of disturbance during the month. In particular the noise levels were elevated at the start of monitoring on the 8th and 12th April falling to a lower level at about 01:30 the following morning. Since there was no sharp increase during the monitoring period, these high levels were not alerted by the monitor but are clearly visible on the charts.
An increase was picked up by the monitor at 01:30 on the 30th April and the associated audio file suggests the onset of flaring.
COMMENTS 7/4/19
Overall noise levels remain low.
Only 2 incidents picked up from Wilton Site including a very short vent incident on 7th March at 01:30. A more disturbing unusual event occured on the 26th March which involved both high and low frequency tones. The monitor only picked up the start of this event but the time traces seem to indicate that it persisted in short bursts for about 1 3/4 hours. There were several incidents of geese, vehicle and emergency service noise during the month.
The fire Station wind and speed indicator was brought back into service on the 22nd March.
COMMENTS 5/3/19
The Fire Station wind speed and direction instrumentation failed in the middle of February and is still out of action. This has limited the analysis of noise versus wind vector.
There were a number of venting incidents during the month but only two of note. One started gradually on the 7th Feb at 03:10 and and continued at least until the end of the monitoring period at )5:00. The second event started gradually on the 11th Feb at 00:05 and continued to 01:30 when there was a sudden cut off. Neither incidents triggered the noise monitor due to the gradual build up.
The short incidents that triggered the monitor were mostly non works related and geese were responsible for a most of these.
Overall the noise levels at Lazenby remain low.
COMMENTS 4/2/19
Updates to web site carried out for 2019. Noise levels for January higher than annual averages but that is normal. Venting? incident took place at around 02:!5 on the 24th January.
COMMENTS 2/1/19
The statistical data for the year shows that the levels of noise at Lazenby remain at an all time low. There were a number of short vent? incidents during December but evidence from the time history traces suggests the one event, starting on the 5th December at 00:15 continued throughout the night.
There have been some problems with the web site throughout the month due to relocation of the service provider. The problems have now been resolved but incident data will be out of date until new incidents arise.