Subject: Re: [AUDITORY] Sound level meter for earphone/headphone measurements From: Sam Mathias <srm112@xxxxxxxx> Date: Tue, 7 Feb 2023 06:58:45 -0500--09fed49d566546e49a7725bd6bab7ad1 Content-Type: text/plain;charset=utf-8 Content-Transfer-Encoding: quoted-printable Hi Sebastian, I considered this device myself some time ago. There are some thorough r= eviews (with measurements) online by headphone enthusiasts, but as you w= rote, not many. Here is a useful one you might not have seen, I found it= via a link on a audiosciencereview.com forum post: https://www.soundstagesolo.com/index.php/features/152-is-minidsp-ears-th= e-death-of-headphone-measurement-or-its-savior The deviations from the standards-compliant GRAS at high frequencies wer= e enough to put me off. I guess you could buy one anyway and use these d= ata to compensate your measurements, or make your own compensations if y= ou have access to the BK system. If you have the time but not the cash, another possibility is to buy a c= heap artificial ear coupler and mic rig made in China from Aliexpress. H= ere is a post by someone who did this. Apparently the devices can work q= uite well at approximating the standards but considerable work is needed= to get there because the supplied calibration data are poorly done. https://www.audiosciencereview.com/forum/index.php?threads/iec-60318-4-c= lone-coupler-is-it-worth-it.23865/ Sam On Mon, 6 Feb 2023, at 8:55 AM, Sebastian Puschmann wrote: >=20 >=20 > Dear all, > I am looking for buying advice on a budget-friendly sound meter system= (< 1,000 EUR) to measure both headphone and insert earphone levels at o= ur MRI facility. > We already have access to a B&K sound level meter + artificial ear tha= t can be borrowed from another department whenever high precision readin= gs are needed. Now, we want to add another device to be kept at the MRI = center for =E2=80=9Cquick and easy=E2=80=9D sound level checks. > When searching for suitable devices, I came across the =E2=80=9CMiniDS= P EARS Headphone Measuring System=E2=80=9D. In principle, it should have= the needed functionality, but the few available user reviews seem rathe= r mixed. > I would appreciate any input and suggestions on what to buy. > Thanks a lot! > Sebastian >=20 >=20 > --=20 > Dr. Sebastian Puschmann > Biological Psychology Lab > Department of Psychology > School of Medicine and Health Sciences > Carl von Ossietzky University Oldenburg=20 > 26111 Oldenburg > Germany --09fed49d566546e49a7725bd6bab7ad1 Content-Type: text/html;charset=utf-8 Content-Transfer-Encoding: quoted-printable <!DOCTYPE html><html><head><title></title><style type=3D"text/css">p.Mso= Normal,p.MsoNoSpacing{margin:0}</style></head><body><div>Hi Sebastian,<b= r></div><div><br></div><div>I considered this device myself some time ag= o. There are some thorough reviews (with measurements) online by headpho= ne enthusiasts, but as you wrote, not many. Here is a useful one you mig= ht not have seen, I found it via a link on a audiosciencereview.com foru= m post:<br></div><div><br></div><div><a href=3D"https://www.soundstageso= lo.com/index.php/features/152-is-minidsp-ears-the-death-of-headphone-mea= surement-or-its-savior" class=3D"">https://www.soundstagesolo.com/index.= php/features/152-is-minidsp-ears-the-death-of-headphone-measurement-or-i= ts-savior</a><br></div><div><br></div><div>The deviations from the stand= ards-compliant GRAS at high frequencies were enough to put me off. I gue= ss you could buy one anyway and use these data to compensate your measur= ements, or make your own compensations if you have access to the BK syst= em.<br></div><div><br></div><div>If you have the time but not the cash, = another possibility is to buy a cheap artificial ear coupler and mic rig= made in China from Aliexpress. Here is a post by someone who did this. = Apparently the devices can work quite well at approximating the standard= s but considerable work is needed to get there because the supplied cali= bration data are poorly done.<br></div><div><br></div><div><a href=3D"ht= tps://www.audiosciencereview.com/forum/index.php?threads/iec-60318-4-clo= ne-coupler-is-it-worth-it.23865/">https://www.audiosciencereview.com/for= um/index.php?threads/iec-60318-4-clone-coupler-is-it-worth-it.23865/</a>= <br></div><div><br></div><div>Sam</div><div><br></div><div>On Mon, 6 Feb= 2023, at 8:55 AM, Sebastian Puschmann wrote:<br></div><blockquote type=3D= "cite" id=3D"qt" style=3D"padding-bottom:1px;"><p><br></p><p class=3D"qt= -MsoNormal"><span style=3D"" lang=3D"EN-CA">Dear all,</span><span style=3D= "" lang=3D"EN-CA"></span><br></p><p class=3D"qt-MsoNormal"><span style=3D= "" lang=3D"EN-CA">I am looking for buying advice on a budget-friendly sound meter system (< 1,000 EUR) to measure both headphone and insert earphone levels at our MRI facility.</span><br></p><p class=3D"qt-MsoNormal"><span style=3D= "" lang=3D"EN-CA">We already have access to a B&K sound level meter + artificial ear that can be borrowed </span><span style=3D"" lang=3D"EN-CA"><s= pan style=3D"" lang=3D"EN-CA">from another department </span>whenever high precision readings are neede= d. Now, we want to add another device to be kept at the MRI center for =E2=80=9Cq= uick and easy=E2=80=9D sound level checks.</span><br></p><p class=3D"qt-MsoNormal"><span st= yle=3D"" lang=3D"EN-CA">When searching for suitable devices, I came across the =E2=80=9CMiniDSP EARS Headphone Measuring System=E2= =80=9D. In principle, it should have the needed functionality, but the few available user reviews seem rather mixed.</span><br></p><p= class=3D"qt-MsoNormal"><span style=3D"" lang=3D"EN-CA">I would appreciate any input and suggestions on what to buy.</span><br= ></p><p class=3D"qt-MsoNormal"><span style=3D"" lang=3D"EN-CA">Thanks a = lot!</span><br></p><p class=3D"qt-MsoNormal"><span style=3D"" lang=3D"EN= -CA">Sebastian</span><br></p><p><br></p><pre class=3D"qt-moz-signature" = cols=3D"72">--=20 Dr. Sebastian Puschmann Biological Psychology Lab Department of Psychology School of Medicine and Health Sciences Carl von Ossietzky University Oldenburg=20 26111 Oldenburg Germany<br></pre></blockquote><div><br></div></body></html> --09fed49d566546e49a7725bd6bab7ad1--