Signal path:
Male singing voice - mic - Pleiades (130Ω,40mH) inline gentle slope high pass filter - Sony TC-D5 Pro mic preamp set to mono - Sennheiser HD580 - listener's brain
Both mics sound bass heavy on singing due to Fletcher Munson, Voice Effort curves, and proximity effect for the Unidyne III. So a Pleiades (R,L) filter is inserted for approaching the ideal of flat frequency response from producer's brain to listener's brain [Lowe, Morgan].
When the Pleiades (resistor in series with inductor) filter inside a Neutrik modules XLR female to male adaptor s connected between mic and preamplifier bass heaviness disappears.
The microphones sound very nice with the following difference:
The Unidyne III sounds with an extended high frequency response. More treble detail.
The VP64 has to be used closer as it is omni for same dryness. It is also more sensitive or high output.
Later addition:
After a few days the Fostex M80RP was tested at same conditions. It sounds more extended at high frequency than the Unidyne III. See recent forward in time posts.
Reference:
Sound Picture Recording and Reproducing Characteristcs - D. P. Lowe, K. F. Morgan - Journal of the Society of Motion Picture Engineers
No comments:
Post a Comment