[Sursound] Ambisonics featured in BBCs Click
http://www.bbc.co.uk/programmes/b013pdnf Some exposure on the telly for Ambisonics, WFS and general good quality sound! Andrew J. Horsburgh, Researcher andrew.horsbu...@uws.ac.uk Ambisonic & Spatial Audio Research Group University of the West of Scotland, www.uws.ac.uk Please consider the environment and think before you print *** University of the West of Scotland aims to have a transformational influence on the economic, social and cultural development of the West of Scotland and beyond by providing relevant, high quality, inclusive higher education and innovative and useful research. Visit www.uws.ac.uk for more details University of the West of Scotland is a registered Scottish charity. Charity number SC002520. *** Legal disclaimer -- The information transmitted is the property of the University of the West of Scotland and is intended only for the person or entity to which it is addressed and may contain confidential and/or privileged material. Statements and opinions expressed in this e-mail may not represent those of the company. Any review, retransmission, dissemination and other use of, or taking of any action in reliance upon, this information by persons or entities other than the intended recipient is prohibited. If you received this in error, please contact the sender immediately and delete the material from any computer. -- ___ Sursound mailing list Sursound@music.vt.edu https://mail.music.vt.edu/mailman/listinfo/sursound
Re: [Sursound] mic body and tetrahedral array
> How does the eq make the capsules more(virtually)coincident? http://tech.groups.yahoo.com/group/SoundfieldMic/files/Ricardo/ has details. The phase as well as the amplitude has to be corrected. > What would the noticable audible negative side effects of an ambisonic mic be which was not adjusted with eq to make the capsules more coincident? The same paper also shows up to 6 dB wonkiness in the frequency response and this will be the most obvious effect of not incorporating the EQ. In fact, this is likely to be even greater for a practical mike; up to 10dB on the Soundfields. There's a lot of myth about "coincidence" correction. But this is inextricably linked with the frequency response correction. The correct EQ for one also solves the other. A less obvious but important effect is the response of simulated mikes will vary with pattern and direction. You get this with all variable pattern mikes but the variation is much less with a properly aligned and EQ'd tetrahedral mike. If the soundfield mike is NOT properly aligned & EQ'd, the variation will be even greater. Lastly, some effects of "non-coincidence" will be manifest. The most important of these is that the W omni signal will no longer be more omni than a 1/2" B&K measurement omni. You will see signs of combing. A big advantage of a tetrahedral mike is that the mono signal is excellent and 'free' from these artifacts. This is important to broadcasters. One perceived effect of 'non-coincidence' is that the omni & Blumlein fig-8s will no longer capture the reverberant field of a good recording venue accurately. These are the only 2 'stereo' arrangments which can theoretically do this. But only a properly aligned & EQ'd tetrahedral mike demonstrates this clearly as it requires flat frequency response in ALL directions. ___ Sursound mailing list Sursound@music.vt.edu https://mail.music.vt.edu/mailman/listinfo/sursound
