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Thread: Grounding boxes - The real deal

  1. #451
    Join Date: Nov 2011

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    I'm Adrian.

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    Quote Originally Posted by anthonyTD View Post
    One of the most well known Mic's in the business! https://en-de.neumann.com/u-87-ai#technical-data
    On a similar line Brüel & Kjear make some of the most widely used and accurate measuring microphones in the world and the one generally used for measurement of SPL is https://www.bksv.com/en/products/tra...artridges/4145 Type 4145 which has a frequency range of 2.6hz to 18khz, and "designed for low-level and laboratory free-field measurements, it is also suitable for sound pressure measurements in accordance with IEC 61672 Class 1" which is the recognised standard range for testing for hearing damage.

    They also make the 4194 which will go up to 40khz, however this mic tends to be used in industrial applications where extreme constant high frequencies are emitted at very high sound pressure levels.

    The 4145 is the one that is generally used to record SPL's and assess environmental impacts generally, I believe this is because it is generally recognised that the majority of human hearing drops off rapidly beyond 18khz.
    Listening is the act of aural discrimination and dissemination of sound, and accepting you get it wrong sometimes.

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  2. #452
    Join Date: Jan 2008

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    I'm Tony.

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    Martin

    My credibility is just fine thank you.

    I suspect you did not read the post clearly, what I said was 'perceived' not heard extra harmonic structures in reproduced music.
    A great many speakers have bandwidth going way beyond 22Khz and more:- Focal (40Khz), Magico (50Khz), Sonus Faber (35Khz) YG (40Khz +), Quadral (65Khz),Verity audio (60Khz) Tad (100Khz) Rock-port technologies (35Khz), Audio Nec (45Khz), Wilson audio (35Khz) etc.

    Those guys that use super-tweeters do not just 'perceive' extended upper frequencies, they also gain improved bottom end depth and details coupled with a more smoother and open mid ban presence. Even the beloved Tannoy's have they own version which has a 62Khz bandwidth going up to a 'Usable 100Khz' So is that a sales gimmick on their behalf?

    Product information"

    With regard to microphones, yes they are many very highly respected 20Khz phone's agree 100%, we actually use one of those mentioned in of the studio's, however we also use Sanken and Earthworks models which have 40Khz and 100khz bandwidths. Depending on what you are recording, female vocals, classical ensemble, folk, Rock or metal, each genre requires a different approach.

    Interestingly we have one of these new mike designs on order, has been creating a lot of buzz in the pro industry for its superb handing of the whole soundscape.

    Ehrlund EHR-M


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  3. #453
    Join Date: Oct 2012

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    I'm Alan.

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    Quote Originally Posted by Mr. C View Post
    Incredible microphone, I've read about it's development before. Inspired shape for the pick-up element.

  4. #454
    Join Date: Aug 2009

    Location: Staffordshire, England

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    I'm Martin.

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    Quote Originally Posted by Mr. C View Post
    Martin

    My credibility is just fine thank you.

    I suspect you did not read the post clearly, what I said was 'perceived' not heard extra harmonic structures in reproduced music.
    !
    So 'perceived' is not the same as 'heard'? Assuming I accept that for a second can you show me the research that says that we 'perceive' sounds at a higher frequency than 22KHz?

    Do that and I'll get off your back
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  5. #455
    Join Date: Feb 2013

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    I'm Grant.

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    http://www.aes.org/e-lib/browse.cfm?elib=5509 i did find that such studies have been done. not paying for the paper tho
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  6. #456
    Join Date: Aug 2009

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    I'm Martin.

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    I know the studies have been done that's why I'm pretty confident in what I'm saying.
    Current Lash Up:

    TEAC VRDS 701T > Sony TAE1000ESD > Krell KSA50S > JM Labs Focal Electra 926.

  7. #457
    Join Date: Apr 2008

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    I'm Clive.

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    Quote Originally Posted by Macca View Post
    So 'perceived' is not the same as 'heard'? Assuming I accept that for a second can you show me the research that says that we 'perceive' sounds at a higher frequency than 22KHz?

    Do that and I'll get off your back
    Yes perceived doesn't necessarily mean hear. You perceive very deep bass, you don't hear it.
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  8. #458
    Join Date: Aug 2009

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    I'm Martin.

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    You feel deep bass. Not sure that you can feel 45Khz though.
    Current Lash Up:

    TEAC VRDS 701T > Sony TAE1000ESD > Krell KSA50S > JM Labs Focal Electra 926.

  9. #459
    Join Date: Apr 2008

    Location: Cheshire, UK

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    I'm Clive.

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    Quote Originally Posted by Macca View Post
    You feel deep bass. Not sure that you can feel 45Khz though.
    It's about sensing it. Can you define how you perceive 8Hz? I don't find it because my trousers are flapping. I may well be sensing pressure changes but that's only my supposition. 45kHz when it's a harmonic of a note we can hear may well be perceived in some way....I don't know for sure but I'm not ruling it out.

    Oh I see the previously linked scientific paper supports some form of such sensing of high frequencies.
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    Bass Amp & DSP Behringer iNuke NU3000DSP x 2
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  10. #460
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    Quote Originally Posted by struth View Post
    http://www.aes.org/e-lib/browse.cfm?elib=5509 i did find that such studies have been done. not paying for the paper tho

    AES may be charging for it but it looks like the authors have put it in the public domain.
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