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Re: [AUDITORY] Tweeters for noise trauma

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

Henrik Sundt

> 11. feb. 2021 kl. 11:12 skrev Boris Gourévitch <boris@xxxxxxxxx>:
> 
> Dear auditory list,
> 
> 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).
> 
> 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 ?
> 
> 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 ?
> 
> Same question with other speakers as well. I'm not an acoustician/electronician and I am probably missing something here.
> 
> 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.
> 
> Best regards
> 
> Boris
> 
> -- 
> Dr Boris Gourévitch
> CNRS Researcher
> 
> Institut de l'Audition
> UMR1120 Inserm, Institut Pasteur
> 63 rue de Charenton
> 75012 Paris, France
> 
> Tel: (+33) 1 76 53 50 41
> 
> Personal Web page: http://www.pi314.net/
> 
> 
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