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Simple synchronic detection at audio frequencies through a PC sound card
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10.1063/1.2740063
/content/aip/journal/rsi/78/5/10.1063/1.2740063
http://aip.metastore.ingenta.com/content/aip/journal/rsi/78/5/10.1063/1.2740063
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

Block diagram of a sound card based lock-in.

Image of FIG. 2.
FIG. 2.

Phasor diagram.

Image of FIG. 3.
FIG. 3.

Amplitude error versus signal to noise ratio at .

Image of FIG. 4.
FIG. 4.

Phase error vs signal to noise ratio at .

Image of FIG. 5.
FIG. 5.

Photoacoustic signal of diluted in air acquired with the PC system and an Stanford Research SR830 lock-in.

Image of FIG. 6.
FIG. 6.

Amplitude relative error vs frequency. Data correspond to Fig. 5.

Image of FIG. 7.
FIG. 7.

Phase error vs frequency. Data correspond to Fig. 5.

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/content/aip/journal/rsi/78/5/10.1063/1.2740063
2007-05-29
2014-04-25
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Simple synchronic detection at audio frequencies through a PC sound card
http://aip.metastore.ingenta.com/content/aip/journal/rsi/78/5/10.1063/1.2740063
10.1063/1.2740063
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