USB sound cards (=?ISO-8859-1?Q?=22Henrik_M=F8ller_=28private=29=22?=)

Subject: USB sound cards
From:    =?ISO-8859-1?Q?=22Henrik_M=F8ller_=28private=29=22?= <=?ISO-8859-1?Q?=22Henrik_M=F8ller_=28private=29=22?=>
Date:    Wed, 10 Dec 2014 23:53:42 +0100

Dear list, Along with the present discussion of Bob Carlyon's question about sound cards driving headphones with high voltage, I have another question about sound cards. I want to calibrate the low-frequency response of a microphone in a small closed coupler driven by a small loudspeaker. Although I can do this in a laboratory setup, I would like to make a desktop routine check - i.e. with the smallest setup as possible. A USB sound card that can drive an 8 ohm loudspeaker directly would be perfect. Some old Sound Blaster PCI cards could, but I wonder if there are newer cards that can? To be more precise, the output impedance should be much lower than 8 ohm, e.g. 1 ohm or less. I need a decent low-frequency response, too. Preferably to DC, but at least to a few Hz. Latency and high voltage are not issues. Low noise and low price would be nice but not necessary. I wonder if someone has any experience and proposals? Best regards, Henrik -- Henrik Møller Professor Emeritus Aalborg University Phone: +45 9940 8711 Private mobile phone: +45 4280 3950

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