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13th Jan 2021, 10:35 pm
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#1 |
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Octode
Join Date: Dec 2008
Location: Wincanton, Somerset, UK.
Posts: 1,215
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B&K 2235 sound-level meter instructions
I can't find any proper data on the web. Does anyone happen to have more information? I do have some data on the microphone (type 4175)
John |
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14th Jan 2021, 3:25 pm
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#2 |
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Octode
Join Date: Nov 2011
Location: Manchester, UK.
Posts: 1,370
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Re: B&K 2235 sound-level meter instructions
Hi John. I used to live in this world. What do you want to know about it? Could start a thread in test gear, if you want to discuss using it.
cheers Mark
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"The best dBs, come in 3s" - Woody Brown |
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14th Jan 2021, 3:36 pm
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#3 |
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Octode
Join Date: Dec 2008
Location: Wincanton, Somerset, UK.
Posts: 1,215
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Re: B&K 2235 sound-level meter instructions
Mark:
I've just this minute received a scan of the user manual from B&K UK. So a big thankyou to them! I have used an earlier version of this back in the 70's when I think there was an analogue meter / display? I'm hoping to use it to measure loudspeaker response, so will need to investigate the analogue outputs, which appear to be miniature jacks (smaller than conventional phone jacks). Happy to start a Test gear thread. Thanks, John |
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14th Jan 2021, 4:19 pm
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#4 |
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Octode
Join Date: Nov 2011
Location: Manchester, UK.
Posts: 1,370
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Re: B&K 2235 sound-level meter instructions
There will be something called ‘ac out’ which will be the signal itself, and probably also a dc signal proportional to the reading in dB which you could use to drive a plotter. In the absence of a semi- or anechoic room, you could do worse than lying the speaker on its back outside and measuring a couple of meters up in the air. On a dry day! The quickest way would be to use a noise generator and take the ac out signal into an FFT analyser of some kind - even a soundcard and then sort it out in matlab. Does excel do fft yet?
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"The best dBs, come in 3s" - Woody Brown |
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14th Jan 2021, 4:45 pm
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#5 |
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Octode
Join Date: Dec 2008
Location: Wincanton, Somerset, UK.
Posts: 1,215
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Re: B&K 2235 sound-level meter instructions
Mark: yes, awaiting fine weather for outdoor experiments. :>)
I do have an HP FFT analyser (3561A) which is invaluable. Now to try to source the jack-plugs! John |
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15th Jan 2021, 7:04 am
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#6 | |
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Dekatron
Join Date: Jul 2009
Location: Sleaford, Lincs. UK.
Posts: 5,735
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Re: B&K 2235 sound-level meter instructions
Quote:
Have you had a look at REW John - http://www.roomeqwizard.com/ you should be able to use the calibrated mic in your 2235. What are the jacks? DIN type? Andy.
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Curiosity hasn't killed this cat...so far. |
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16th Jan 2021, 11:06 am
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#7 |
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Octode
Join Date: Dec 2008
Location: Wincanton, Somerset, UK.
Posts: 1,215
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Re: B&K 2235 sound-level meter instructions
Andy: the output sockets appear to be 2.5mm, presumably single-pole.
John |
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