Dear Group
I have always found P&A very efficient.
Clare
Amanda Dowson wrote:
>
> I hope that Vitalograph are able to justify those reports otherwise they
> could be construed as slanderous!
>
> I have always found P&A very good and have been using them for over 10 years
> without problem. Is this a marketing trick?
>
> -----Original Message-----
> From: Barnes Anne A [mailto:[log in to unmask]]
> Sent: 08 January 2004 14:27
> To: [log in to unmask]
> Subject: Re: Audiometer calibrations
>
> We have stopped using P&A due to bad reports from vitalograph and am looking
> for someone else who can calibrate microloops and audio equipment.
> Anne Barnes
>
> -----Original Message-----
> From: Johnson, Graham [mailto:[log in to unmask]]
> Sent: 08 January 2004 14:18
> To: [log in to unmask]
> Subject: Re: Audiometer calibrations
>
> We use our local NHS Trust in Liverpool
>
> Ask for the Bio Medical department who may be able to help.
>
> Failing that try P & A Medical Ltd.
>
> 01204 676180
>
> -----Original Message-----
> From: Nick Aubrey [mailto:[log in to unmask]]
> Sent: 08 January 2004 14:13
> To: [log in to unmask]
> Subject: Re: Audiometer calibrations
>
> ****************************************************************************
> This Message originated from the Internet.
> Users are warned against trusting content of such messages.
> ****************************************************************************
>
> following on from that, could anyone recommend an organisation that
> undertakes calibration of audio equipment?
>
> regards
> Nick
>
> -----Original Message-----
> From: Sam Davies [mailto:[log in to unmask]]
> Sent: 08 January 2004 13:56
> To: [log in to unmask]
> Subject: Audiometer calibrations
>
> I have received a very comprehensive response which I have forwarded as I'm
> sure others performing audios will find it of interest.
>
> Regards
> Samantha Davies
>
> Occupational Health Adviser
> Trinity Mirror Midlands
>
> Tel - 0121 2363366 Ex 3099
>
> ----- Forwarded by Samantha Davies/HUMAN RESOURCES/MG_REG on 08/01/2004
> 13:51 -----
>
> [log in to unmask]
> m To:
> [log in to unmask]
> cc:
> 08/01/2004 13:37 Subject: Audiometer
> calibrations
>
> MS26 refers to EN26189 which recommends:-
> 1) Daily ---- a listening check for clicks, tone switching transients,
> distortion etc at 3 levels on all of the frequencies used for testing.
>
> 2) At least weekly ---- do an audiogram on someone who has thresholds
> better than 25dB on each normal test frequency. Any deviation exceeding
> 10dB from the last test suggests an objective calibration test ( 3) below)
> is required.
>
> 3) At 3 monthly intervals --- Check the frequency accuracy for each
> frequency used. Check the level accuracy on each frequency and ear using
> measurement instrumentation.
>
> 4) At 2 yearly intervals --- Check frequency accuracy, harmonic distortion,
> level accuracy, on/off ratio and rise/fall times, condition of earphones
> and cables, using measurement instrumentation.
>
> Now, I have to admit I don't know of anyone in an occupational health dept.
> who follows the above regime. EN26189 or BS 6655 as it was known, was
> published back to 1986 (it was probably drafted a few years prior to that)
> and modern electronics are much more stable than they used to be.
>
> With Asra you can easily do 2) above by selecting a 3 frequency list and
> doing a test on yourself or a biologic simulator. This will take no more
> than 3 minutes. If you save the audiogram you produce you will be able to
> click on the passive button and retrieve as many of your previous short
> test audiograms as you want for comparison with the new one.
>
> If each point is within 10dB, then according to the standard you can
> continue to use the audiometer. You will also be able to listen for any
> clicks etc during this test if you do it on yourself, thus satisfying 1)
> above.
>
> By doing a full calibration annually you are stretching the 3 monthly
> recommendation but compressing the 2 yearly one.
>
> Given the stability of modern PC based units I believe that to be entirely
> reasonable.
>
> Please let me know if I can help further, and if you think this reply would
> be useful to other users of audiometric equipment, please post the reply to
> the list.
>
> Regards
>
> Eric Greig
>
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Clare Sims [log in to unmask]
Occupational Health Nursing Adviser
Occupational Health & Safety Unit
Penbre
University Of Wales
Bangor
LL572DB
01248 382 575
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