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Module by: Ed Doering. E-mail the author

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Name: Speaker-Air-Microphone (SAM) Channel Characterization
ID: m18666
Language: English (en)
Summary: A speaker and microphone connected to a computer serve as an excellent communications channel because the transmitted information is audible. Listening to the channel while making parameter adjustments and viewing plots builds additional insight into the specific modulation scheme under study. This project describes how to characterize a "speaker-air-microphone" (SAM) channel for use in subsequent projects that use bandpass modulation techniques.
Subject: Science and Technology
Keywords: audio communications channel, band limited channel, channel characterization, LabVIEW, microphone, soundcard interface, speaker, speaker-air-microphone channel, wireless communications
Document Type: -//CNX//DTD CNXML 0.5 plus MathML//EN
License: Creative Commons Attribution License CC-BY 2.0

Authors: Ed Doering (
Copyright Holders: Ed Doering (
Maintainers: Ed Doering (, Brett Hern (, Sam Shearman (, Erik Luther (
Editors: Brett Hern (, Sam Shearman (, Erik Luther (

Latest version: 1.2 (history)
First publication date: Aug 13, 2008 12:38 pm -0500
Last revision to module: Dec 10, 2008 9:49 am -0600


PDF: m18666_1.2.pdf PDF file, for viewing content offline and printing. Learn more.
XML: m18666_1.2.cnxml XML that defines the structure and contents of the module, minus any included media files. Can be reimported in the editing interface. Learn more.

Version History

Version: 1.2 Dec 10, 2008 9:49 am -0600 by Sam Shearman
updated boilerplate

Version: 1.1 Nov 29, 2008 3:24 pm -0600 by Ed Doering
Initial release

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