Vicki--
Based on your tests so far, is this rule of thumb correct for when to
use High of Low Sensitivity on the LS-10?
Use the High Sensitivity setting on the LS-10 if the meter (in High
Sens mode) indicates that level of "4" or higher is required. Use a
Low Sensitivity setting of "10" if the meter (in High Sens mode)
indicates a level of "3" or lower is required. Rob D.
= = = = =
At 4:51 PM +1000 7/7/08, Vicki Powys wrote:
>Sorry that my last message to Rob was not quite right! I herewith
>make a correction.
>
>More indoor tests today (using a softly beeping electronic
>metronome): For loud sounds e.g. lyrebirds, if you have a strong
>signal at high sensitivity volume 2, you will get a better (less
>noisy) result if you switch to low sensitivity and volume 10. The
>signal will be about the SAME, but the noise a lot less. This rule
>applies if you are using ME67, WL-183s, or built-in mics.
>
>However if you need the recorder on high sensitivity volume 5 to get
>a decent signal, it is not worth trying to use low sensitivity on
>volume 10 then boosting the signal later (if you do, the noise levels
>will be very roughly the same).
>
>I have done more tests with the WL-183s, on high sensitivity volume 5
>(a good average level for recording birdsong). They give a very
>slightly LESS strong signal than the built in mics, but when the
>signal levels are equalized, the 183s are still a bit less noisy.
>The 183s seem to work best (less noise) with the low cut ON,
>alternatively they need a bit of low roll off below 500 hz.
>
>Vicki Powys
>Australia
>
>On 07/07/2008, at 9:17 AM, Vicki Powys wrote:
>
>> Hi Rob,
>>
>> Yes I have tried lining up two files, one recorded in high
>> sensitivity volume 2, the other on low sensitivity volume 10. I then
>> increased the levels of the low sens. file by 5 dB (also 7 dB) to
>> match the levels (of the recorded bird sounds or whatever) of the
>> high sens. file. The exact amount of increase needed I am still
>> working on, but it seems to be about 5-7 dB. Even with this
>> increase, the noise levels are still lower with the low sens. file,
>> especially the FIZZ noise.
>>
>> Vicki
>>
>> On 06/07/2008, at 2:01 PM, Rob Danielson wrote:
>>
>>> At 11:52 AM +1000 7/6/08, Vicki Powys wrote:
>>>> All,
>>>>
>>>> Using an ME67 connected to my LS-10, I have done a bit more testing
>>>> in the field (and indoors) of noise levels using high vs low
>>>> sensitivity. For lyrebirds, I do seem to get a better result using
>>>> low sensitivity at volume 10, instead of high sensitivity at volume
>>>> 2. There is much less FIZZ.
>>>>
>>>> But also, surprisingly, I seemed to get better results yesterday
>>>> when
>>>> recording Regent Honeyeaters (they have a soft melodious call),
>>>> using
>>>> low sensitivity at volume 10, then raising the levels to match
>>>> what I
>>>> had recorded at high sensitivity at volume 5. Again, much less FIZZ
>>>> on low sens.
>>>
>>> Did you confirm this with matched playback levels? If not, place the
>>> tests made with high and low sensitivity one after the other on
>>> different tracks in a time-line. Boost the playback volume of the low
>>> sensitivity one to match the playback level of the louder (high
>>> sensitivity) one. You should be able to hear the difference in the
>>> "fizz" noise level where the two files join.
>>>
>>>>
>>>> This seems to be a very complex issue! More testing needed!
>>>>
>>>> I haven't tried these tests with the WL-183s, but would suspect a
>>>> similar result.
>>>
>>> Perhaps. The WL-183's are fairly sensitive mics but not in the same
>>> ballpark with the ME-67.
>>>
>>>>
>>>> Re my binaural setup, and your comment Rob (see below), where do I
>>>> find Aaron's DSM temple mount set up?
>>>
>>> Aaron uses a WHB/N Windscreen
>>>
>>><http://www.sonicstudios.com/access.htm#whb>http://www.sonicstudios.com/access.htm#whb
>>>
>>>I'm not sure if Leonard
>>> sells just the mount-windscreen or not but you can see how his design
>>> works in the pictures. Rob D.
>>>
>>>
>>>
>>>>
> >>> Vicki Powys
>>>> Australia
>>>>
>>>> On 03/07/2008, at 12:31 AM, Raimund Specht wrote:
>>>>
>>>>>
>>>>> Rob Danielson wrote:
> >>>>>
>>>>>> A metronome at 5 metres might be a pretty "hot" reference signal.
>>>>>> Its possible that the "Low Sensitivity" setting might not provide
>>>>>> sufficient gain for quieter sounds and environments. Its worth
>>>>>> further investigation, for sure.
>>>>>>
>>>>>> Coincidentally, earlier today, I thought of Aaron's DSM temple
>>>>>> mount
>>>>>> preference in relation to your WL-183 rig priorities. Rob D.
>>>>>
>>>>> Yes, this is a relatively loud test signal. Though, I believe that
>>>>> this is an adequate model for a loudly singing Lyrebird.
>>>>>
>>>>> For recording softer sounds, one should perhaps better use the
>>>>> HIGH
>>>>> MIC SENSE setting. The problem with the Lyrebird was obviously
>>>>> that
>>>>> the REC LEVEL was turned down to 2, which caused the higher
>>>>> overall
>>>>> noise level. In other words, it is not appropriate to attenuate
>>>>> the
>>>>> microphone signal and then amplify it again in the next stage.
>>>>>
>>>>> Note that the MIC 2 input of the TASCAM DR-1 also provides a
>>>>> relatively low gain (input clipping level: -28 dBu), while its
>>>>> inherent noise floor (-115 dBu(A)) is still good enough for the
>>>>> K6/ME6x series.
>>>>>
>>>>> Regards,
>>>>> Raimund
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>
>> ------------------------------------
>>
>> "While a picture is worth a thousand words, a
>> sound is worth a thousand pictures." R. Murray Schafer via Bernie
>> Krause
>> Yahoo! Groups Links
>>
>>
>>
>
>
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