Echo Audio Indigo io User Manual

Technical Memorandum 17 October 1993 Revision date: October 2010 555 North 30th Street, Omaha, NE 68131 (402) 498-6700 BOYS TOWN NATIONAL RESEARCH

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APPENDIX A: Program Installation Windows. The most recent version of PUTT may be downloaded at http://audres.org/downloads/putt-setup.zip. Inside t

APPENDIX B: SOUNDCARD INSTALLATION CardDeluxe The CardDeluxe is manufactured by Digital Audio Labs. http://www.digitalaudio.com/ Connection of the Ca

APPENDIX C: CAVITY CONSTRUCTION The probe calibration cavities are constructed from brass tubing in the dimensions outlined below. A tube cutter is

APPENDIX D: CALIBRATION FILES When PUTT performs in-the-ear calibration, the stimulus waveform and two microphone responses (one for each loudspeaker

px nf+1 complex double crosstalk pressure (Pa/V) df 1 double frequency bin (Hz) dc 1 double cavity diameter (cm) tc 1 double cavity temperatu

Page 17 INDEX CardDeluxe ... 10 emav.ini ...

Table of Contents 1. Introduction ...

1. Introduction PUTT is a contraction of “pure-tone thresholds.” A special feature of the program is its ability to quantify sound levels in terms o

second interval. The threshold sound levels for selected set of frequencies is stored in a TTH file that has the same name as CAL file that contains t

DA2_sensitivity = 0 Sensitivity of the second (or Right) D/A converter in count per volt. When set to zero, the value is calculated from ARSC registry

Freq_start = 500 Starting frequency (Hz). Freq_stop = 40 Highest frequency (Hz). Per_octave = 1 Number of frequencies per octave. Tone_duration = 0

Protocol = 1 Frequency set (1=“standard”, 2=“F1, F2, Fd”) Scope = 2048 Number of waveform points displayed during calibration. hfthr = N Add 9 &

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