The guard is usually a "Pop" filter used to reduce wind and breath noises.
The announcer usually has a microphone preference, the bad ones almost always use a desk stand mounted microphone.
Headsets do work better for uniform level but just aren't very good microphones.
I prefer to use a large diaphragm condenser microphone for the announcer. It doesn't "Pop."
Ah I assumed it was to keep the mouth a set and controlled distance to remove at least one variable.
An externally hosted image should be here but it was not working when we last tested it.
Pointing out that some people sitting in an anechoic chamber can hear -6dB and that at some frequency you can "hear" 135dB safely works for you that's OK. As well as the single 20Hz tone needed to mask a single 1kHz tone, not relevant to listening to music.
IMHO the latest generation of A/D's and D/A's with careful design are totally transparent in any test with real music. If you don't like sigma delta the last generation multi-bit converters in multi device parallel/differential circuits would do.
Does anyone know the devices that Pacific Microsonics can't get anymore?
I have posted this link elsewhere, so apologies for that, but pertinent to the DR discussions BBC News - Cut music to 'an hour a day' - WHO . No idea how much hard science is behind this pronouncement.
Sound Cards - Xonar Essence STX - ASUS
Unfortunately the external version has lots of negative reviews for the USB drivers. Someone in the digital RIAA tread actually measured -118dB in situ. Seems to have some serious non-mainstream engineering both analog and digital. The standalone versions use even multiples of 44,100 to process and play CD tracks like the Pacific Microsonics.
Built-in op-amp rolling now that's
EDIT - noticed in the reviews that the drivers are a work in progress here too.
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The problem is real. Last week I attended an AES presentation by someone who works to restore people's damaged hearing. In the room were many young audio students. To my horror, a sizeable number, in their early 20-ies, admitted they had significant hearing damage due to too loud music.
Whoever wrote that article obviously didn't grasp the point. One hour a day may be OK if you don't listen to louder than say 80 or 85dB. Go to 100dB and the limit, to avoid hearing damage, probably goes down to 10 minutes a day or so.
One hidden problem is the very high levels of lowest base in some dance music. Although that sound is not experienced as so loud, it does whack the hair cells at the entrance of the tube so hard that they are damaged quickly, and the hair cells at the entrance are those that sense the high frequencies. In that way, lows can damage your highs hearing ability.
It's a mess - there have been reports of famous DJ's that threatened to leave the venue unless the limiters were turned off.
Jan
Jan,
I designed and built some dual 18" driver bass horns for PA application years ago. Four of these replaced 16 John Myer enclosures and had so much more spl that the Myers were retired to the trash heap where they belonged. While at an outdoor festival one of the sound guys decided he was going to be an *** and powered up the bass enclosure while I was directly in front of it, it was the first time and only time I thought I was going to lose my hearing, the bass was so loud my ears were ringing, to say the least I was *****d. I've had my head in Altec A2's and just about every other type of bass enclosure and never experienced anything like that bass sound level. it was dangerous.
I designed and built some dual 18" driver bass horns for PA application years ago. Four of these replaced 16 John Myer enclosures and had so much more spl that the Myers were retired to the trash heap where they belonged. While at an outdoor festival one of the sound guys decided he was going to be an *** and powered up the bass enclosure while I was directly in front of it, it was the first time and only time I thought I was going to lose my hearing, the bass was so loud my ears were ringing, to say the least I was *****d. I've had my head in Altec A2's and just about every other type of bass enclosure and never experienced anything like that bass sound level. it was dangerous.
When playing back on a 24 bit system, it is a noticeable improvement in realism/accuracy to the sound. Mo bits is mo betta. No one here has convinced me otherwise.
THx-RNMarsh
The Army did a hearing test before and after basic Training when I was in the Army. They found every one was loosing hearing from practice on the firing range. Millions of young men start life this way with hearing damage. Later, they were issued hearing plugs..... some help. Of course then you cant hear the commands.... in real fire fights no one comes away with good hearing. Millions on all sides will be stuck without knowing what good sound is like. MP3 will be fine for them.
THx-RNMarsh
Thanks for the picture. I have never seen that gizmo before. It is similar to what they tried to use in tanks and airplanes to get the microphones close enough to work in noisy environments. But here used to stabilize level.
One of the fun things in pro audio is cleaning the windscreens... It will not surprise you to learn what they get loaded with. Smokers of course are the worst.
Really,
I have solid over the ear sound barriers for use at the gun range and yes I can hear the person talking to me if nobody happens to be shooting within a few feet at that moment. At work my tooling guys wore soft foam ear plugs and I could easily talk to them while they had a mill or lathe running.
I have solid over the ear sound barriers for use at the gun range and yes I can hear the person talking to me if nobody happens to be shooting within a few feet at that moment. At work my tooling guys wore soft foam ear plugs and I could easily talk to them while they had a mill or lathe running.
Prior question was what is the noise level of unwrapping the cellophane from a piece of hard candy. As older concert goers know there use to be placards asking you to unwrap the candy before the performance so the noise would not bother others.
The unwrapping process has actually been studied. It is a series of sharp impulses as bits of the deformed plastic snap back into shape. When you make the noise measurement with a sound level meter you find it reads less than 10 dBA at 1M. Yet this noise can be heard clearly throughout most concert halls, even though the NC rating may be as high as 35 dB.
Now 10 dBa at 1M allowing even for critical distance reverberation levels or room gain will still be below 0 dB at many seats. The peak concert levels on stage have been recorded by others at 137 dB. Front row levels can easily reach 120 dB. (There is a reason why so many concert musicians lose some of their hearing.)
So now that you are arguing research is not needed just judge with your ears, why don't you try your ears in a live concert and then go back and try the same or similar music on a reproduction system and see just how much difference there really is.
ES
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Making up the rules as we go along. These sharp impulses have a very large crest factor and peak SPL which is what we hear. If standard metrology chooses not to register this that is certainly not a mater for research.
I do use my ears, adjust the volume with headphones for nice comfortable listening then, don't touch that dial, put on a file with 1 lsb at 16 bits of noise. I hear nothing.
Live long and prosper
Yes. For me, the only thing that puts me off, is the inconvenience of operating through a laptop (and not the cost of purchasing it, as I already have one but the cost of bying an external multichannel audio card) when wanting to listen to my stereo audio system. Otherwise , technically wise, PC+ available software, wins over the 2x4miniDSP
I concur to that too.
And I have to say that the pain for achieving the level of 'programing' skills one needs to develop for to come in line with the DSP software arena today, is far less than the pain for to grasp the complexity of hard (ware) electronics
George
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And a lot of things can be improved and upgraded by the customer in one or two clicks. Like firmwares of DSLRs.
Okay, folks - that "undone" version of Californication is here, https://www.dropbox.com/s/i5vwb73drisct1c/Californ.wav?dl=0 - sequence is original, then fiddled, repeated 3 times.
Caveats: a relatively big WAV file, so could do single sequence, convert to FLAC, still big though ... original is an MP3 source, I don't have the album, so don't get hung up on those quality issues ... this was an early exercise, probably could have been tuned a bit more - but gives one an idea ...
Caveats: a relatively big WAV file, so could do single sequence, convert to FLAC, still big though ... original is an MP3 source, I don't have the album, so don't get hung up on those quality issues ... this was an early exercise, probably could have been tuned a bit more - but gives one an idea ...
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