http://soundcloud.com/urlme/d50i-183-primo-dynamics-lev
For web based playback and level matched.
-M
--- 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.
>
> http://urlme.net/audio/D50i-183-Primo-Dynamics.flac
>
> 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:-
> http://soundcloud.com/urlme/melow-binaural
>
> This recording features the BeyerDynamic mics (no ears) recording ambience
> around 30dBA at the quietest level.
>
> The Beyerdynamics (TG-X-80) recording morning din:-
> http://soundcloud.com/urlme/beyerdynamic-tg-x-80-sunday
>
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