Recent content by natty

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    Where to Place Mains

    One of the most popular designs for recording studios monitoring and mixing rooms that also measures well (ie, not just tradition but science) places the speakers either in wall (baffle wall style) or directly on wall. They don't suffer from lack of depth and soundstage. Rather they benefit...
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    Floyd Toole: Sound Reproduction: The Acoustics and Psychoacoustics of Loudspeakers and Rooms (AES Presents) 3rd Edition - Discussion Thread

    Yeah, it is worth an experiment if you have the interest. Getting the speakers very close to the wall pushes that SBIR issue up into higher frequencies so they are significantly easier to control with acoustic absorption. It may or may not be what you like/want/need in your system, of course.
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    Floyd Toole: Sound Reproduction: The Acoustics and Psychoacoustics of Loudspeakers and Rooms (AES Presents) 3rd Edition - Discussion Thread

    Right but if the distance between speaker and wall is very small the six inch panel behind the speaker can kill the sbir.
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    Floyd Toole: Sound Reproduction: The Acoustics and Psychoacoustics of Loudspeakers and Rooms (AES Presents) 3rd Edition - Discussion Thread

    That's fair. I suppose it is also worth noting that while it is "toole's book," my quick estimate is that more than 80% of the research is not his. Like most good (I didn't say definitive) text books, it brings together arguably "all" of the scientific data that has been subject to processes...
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    LCR Upgrade Based on In-Room Response Measures

    Trying to solve a suspected room problem by buying speakers is like trying to bake a pizza by pouring a glass of beer: you might get lucky and have a good time but it’s a roll of the dice! Me, before dropping that much coin on new speakers that may or may not be a step up, I’d spend a several...
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    Floyd Toole: Sound Reproduction: The Acoustics and Psychoacoustics of Loudspeakers and Rooms (AES Presents) 3rd Edition - Discussion Thread

    Classic dipole where it begins to drop off precipitously at wide angles especially at the higher frequencies. Can sound very good but isn't the ideal that much of the research cited in Toole's book calls "usually best". I'm sure my old Maggies had a similar dispersion....and I loved them...
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    Floyd Toole: Sound Reproduction: The Acoustics and Psychoacoustics of Loudspeakers and Rooms (AES Presents) 3rd Edition - Discussion Thread

    lol! I hope that’s not true. Dummy heads, multiple mic positions, good math all help capture the power sound curve that hits the ears, so while at the end of the day my ears have to be happy, good measurement can help me get into the ballpark pretty well. But it helps in different ways...
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    Floyd Toole: Sound Reproduction: The Acoustics and Psychoacoustics of Loudspeakers and Rooms (AES Presents) 3rd Edition - Discussion Thread

    Thanks. Doesn’t seem like they replicated the study then (based on who the test subjects were since most of the studies that Toole mentions have both professionals and lay people) but now I’m even more intrigued about the results and details. What kind of speakers, treatments, content, etc. But...
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    Floyd Toole: Sound Reproduction: The Acoustics and Psychoacoustics of Loudspeakers and Rooms (AES Presents) 3rd Edition - Discussion Thread

    “Average“ can be abused. Supposed to refer to average dialogue apparently. Really it’s that pink noise noise at -20db below full volume, 0dbfs in the digital scale, should be 85 db at the listening position, iirc. C weighted is the definition. Nice discussion here including the comments...
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    Floyd Toole: Sound Reproduction: The Acoustics and Psychoacoustics of Loudspeakers and Rooms (AES Presents) 3rd Edition - Discussion Thread

    To be fair other folks like a tipped up bass response too eg ARC seems to do this and perceptual loudness studies support the idea that one isn’t hearing the intended bass relative to the rest of the audio range when listening below reference leave to movie soundtracks.
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    Floyd Toole: Sound Reproduction: The Acoustics and Psychoacoustics of Loudspeakers and Rooms (AES Presents) 3rd Edition - Discussion Thread

    There are some Quad tests in his 1985/86 AES papers, one page of which I shared, above. I think these were done at the Canada national labs rather than at Harman.
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    Floyd Toole: Sound Reproduction: The Acoustics and Psychoacoustics of Loudspeakers and Rooms (AES Presents) 3rd Edition - Discussion Thread

    Found this. Looks like the 1985/6 study used several recordings of natural sounds/acoustic music in real space:
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    Floyd Toole: Sound Reproduction: The Acoustics and Psychoacoustics of Loudspeakers and Rooms (AES Presents) 3rd Edition - Discussion Thread

    Well, in a sense the diagrams from Owens Corning are probably optimistic for how the panels of fiberglass act when used for absorption in a small room. Toole shares data (again not his) that compares them (industry standard ways of measuring, focused on their use in large spaces) to real world...
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