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Re: Return of the ticking clock...

Subject: Re: Return of the ticking clock...
From: "Mike Rooke" picnet2
Date: Fri Sep 2, 2011 12:08 pm ((PDT))

For web based playback and level matched. 

--- In  "Mike Rooke" <> wrote:
> Engineering / "Gear talk"
> I recently purchased a pair of dynamic mics with the intention of fitting 
> them to a pair of custom made ears. - my findings with regard to the latest 
> (Primo), greatest (Shure 183) and handy (Internal) electret mics vs the 
> dynamics are rather interesting and puzzling at the same time given the 
> sensitivity and self noise differences of the mic capsules. 
> The following recording was made using the Sony D50 (EIN -126dBu) set to max 
> gain. 
> In the order of appearance quoting the self noise in brackets.
> 1. Sony D50 Internal mics (20dBA)
> 2. Shure MX391O - Capsules (22 dBA)
> 3. Primo EM173 - (14 dBA going on 18+)
> 4. BeyerDynamic - Dynamic Mic, 
> noise floor of the recorder is -126 dBu
> Sensitivity is rated at -49.8 dB (3.2mV/PA in old money)
> Self noise estimated at 94-(-49.8 -(-126)) = 17.8 dB
> However in reality due to the 8dB presense "lift" they sounds far lower. 
> Levels have not been matched for playback, they are as recorded at max gain 
> for each particular mic. 
> The clock tick is extremely quiet.
> Comments welcome.  
> Disclaimer: I understand dynamics may not capture "depth" as well as electret 
> condensors although Ive yet to prove this, they do not fit to boundaries very 
> well, handling noise vs electrets is FAR higher, wind sensitivity is also 
> higher - making practical use in the filed interesting to say the least. 
> Those recording in the 70's-80's can probably give more feedback. For static 
> / fixed setups 'under the porch' that are humidity sensitive the dynamics are 
> proving to be much better than I expected relative to the electrets. 
> For the ear rig using lower sensitivity dynamics (1.6mV/PA) an example can be 
> found here:-
> This recording features the BeyerDynamic mics (no ears) recording ambience 
> around 30dBA at the quietest level.
> The Beyerdynamics (TG-X-80) recording morning din:-

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