Re: [AUDITORY] Tweeters for noise trauma ("Henrik G. Sundt" )

Subject: Re: [AUDITORY] Tweeters for noise trauma
From:    "Henrik G. Sundt"  <hsundt@xxxxxxxx>
Date:    Thu, 11 Feb 2021 16:18:36 +0100

How are the ethical concerns in animal testing at such sound pressure =
levels considered?

Henrik Sundt

> 11. feb. 2021 kl. 11:12 skrev Boris Gour=C3=A9vitch <boris@xxxxxxxx>:
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> Dear auditory list,
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> I was looking for a speaker (probably a tweeter) that would reach 120 =
to maybe 130 dB SPL in a high frequency range (for mice).
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> I am a bit puzzled with the many papers inducing noise trauma (i.e. =
Warren, Fenton et al, J Neuroscience 2020; Amanipour et al, 2018; Chen, =
Sheppar and Salvi 2016; Novak, Zelenka et al, 2016) which actually used =
pretty common tweeters to do that. Technical specifications for these =
tweeters do not really indicate that they could handle such high SPL =
(and therefore such high voltage). How did they determine that ? How can =
we know then ? Only by sensitivity measure adjusted for the watt power =
of the speaker ?
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> Let's take an example: in the Warren et al above cited, the Visaton =
speaker from RadioSpare is used to deliver 3kHz at 126 dB SPL. The =
technical specifications =
(https://docs.rs-online.com/170c/0900766b802e5b23.pdf) indicate 30W max =
and a sensitivity of 86 dB. Thus, it seems that this speaker could not =
deliver above 101 dB SPL. How did the authors do to avoid damaging their =
speaker ?
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> Same question with other speakers as well. I'm not an =
acoustician/electronician and I am probably missing something here.
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> Many thanks for your help. Also, many of the tweeters from the papers =
above are discontinued so if you know a pretty robust one that you are =
safely using at high SPLs, please do not hesitate to tell me.
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> Best regards
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> Boris
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> --=20
> Dr Boris Gour=C3=A9vitch
> CNRS Researcher
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> Institut de l'Audition
> UMR1120 Inserm, Institut Pasteur
> 63 rue de Charenton
> 75012 Paris, France
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> Tel: (+33) 1 76 53 50 41
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> Personal Web page: http://www.pi314.net/
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>=20
> --=20
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