Thanks for this Pam - we heard it again in Roman Road on Wednesday night. 
Glad I wasn't just hearing things..! definitely sounds like a humming of 
something electric to me, and yes with varied pitch and intensity. I don't 
think it is aeroplanes as it lasts too long? To me sounds similar to a 
microwave, loud aircon/fans/ventilation system, server room... 

Seems we are not the first community to face this mystery: 
http://www.wisegeek.com/what-is-the-hum.htm 

Hope we can figure it out. 

On Friday, 6 July 2012 12:58:54 UTC+2, Pam Britt wrote:
>
> Hi Ancois
>
> Thanks for the report but the problem is not solved. 
>
> The rumbling vibration persists, although at a lower volume as you note. 
> What I hear is more like a badly tuned motor idling, so variable in pitch 
> and intensity, not a monotone. It's often worst around midnight and seems 
> confined to night - I don't hear anything like it in the period around 
> daybreak. 
>
> Pam
>
>     
>
>
>
>
> On Tuesday, 3 July 2012 09:28:51 UTC+2, ancois - obsid wrote:
>>
>> Hi everyone,
>>
>> I have received feedback from City Health officials that they could not 
>> locate the noise. Being that it has died down, it is difficult for them to 
>> further investigate and they are requesting to close the 'case' until the 
>> issue resurfaces. 
>>
>> I have heard some slight buzzing myself - but nothing at the level it was 
>> before. The mill have also done investigations and liaised with City 
>> officials on this matter and from the investigations it seems the noise did 
>> not originate from there.
>>
>> Should any of the complainants have some feedback in this regard, please 
>> let me know and I can liaise with City officials accordingly.
>>
>> Thanks,
>> Ancois
>>
>>  
>> *Office Manager*
>>
>>
>> *OBSID:      Observatory Improvement District,   Cape Town*
>> *tel*:  021 448 7090        *fax*: 086 639 4005*        *41 Station 
>> road,  Observatory
>> OBSID website <http://www.obs.org.za/improvement-district/>     *   *OBSID 
>> Google 
>> group<https://groups.google.com/forum/?fromgroups#%21forum/obsid-chat>  
>>        * ** *OBSID on 
>> Facebook<http://www.facebook.com/Observatory.Improvement.District>
>>  
>> OBSID on Twitter <https://twitter.com/#%21/OBSID_Obs>       ONW Google 
>> group <https://groups.google.com/forum/#%21forum/obsnw> *          *iloveobs 
>> Google group <https://groups.google.com/forum/#%21forum/iloveobs>
>> *
>> *
>> *Safer, Cleaner, Smarter *
>> *
>> *
>>
>>
>>
>>
>> On 27 June 2012 12:38, Obsid COO <[email protected]> wrote:
>>
>>> Thank you very much
>>> Ursula
>>>
>>>
>>> On Wed, Jun 27, 2012 at 12:32 AM, Pam Britt <[email protected]> wrote:
>>>
>>>>
>>>> Hi all
>>>>
>>>> My tuppence worth... though I'm quite sure why this isn't on the heart 
>>>> of obs group but there you are.
>>>>
>>>> Like others, including a neighbour in Collingwood Road, I have been 
>>>> sleep deprived and generally discomfited by the noise.To the extent that I 
>>>> took a drive around 11pm last night in the direction of Salt River along 
>>>> the roads below Lwr Main towards Albert Rd. Noise definitely louder there 
>>>> and no, I don't think it's the roadworks otherwise I would have heard that 
>>>> when I came back along Liesbeeck Pkwy, as far as opposite the Circus. The 
>>>> Mill stood out because it was bustling with activity, trucks departing and 
>>>> lights on in almost every window. 
>>>>
>>>> Seems quieter tonight, or is it the rain that has dampened the noise? 
>>>>
>>>>
>>>>
>>>>  -- 
>>>> You received this message because you are subscribed to the Google 
>>>> Groups "The Observatory Neighbourhood watch" group.
>>>> To post to this group, send email to [email protected].
>>>> To unsubscribe from this group, send email to 
>>>> [email protected].
>>>> To view this discussion on the web visit 
>>>> https://groups.google.com/d/msg/obsnw/-/3etRCYWgkrQJ.
>>>>
>>>> For more options, visit https://groups.google.com/groups/opt_out.
>>>>  
>>>>  
>>>>
>>>
>>>
>>>
>>> -- 
>>> Ursula van Stavel
>>> Chief Operating Officer
>>> Observatory Improvement District OBSID)
>>>
>>> Tel. 021 4487090
>>> Fax :0866394005
>>> Cell: 0813454285
>>>
>>> Address: 41 Station Road,Observatory,Cape Town ,7925
>>>
>>>  -- 
>>> You received this message because you are subscribed to the Google 
>>> Groups "The Observatory Neighbourhood watch" group.
>>> To post to this group, send email to [email protected].
>>> To unsubscribe from this group, send email to 
>>> [email protected].
>>> For more options, visit https://groups.google.com/groups/opt_out.
>>>  
>>>  
>>>
>>
>>

-- 
You received this message because you are subscribed to the Google Groups "The 
Observatory Neighbourhood watch" group.
To view this discussion on the web visit 
https://groups.google.com/d/msg/obsnw/-/5sc5-pCS204J.
To post to this group, send email to [email protected].
To unsubscribe from this group, send email to 
[email protected].
For more options, visit this group at 
http://groups.google.com/group/obsnw?hl=en.

Reply via email to