Engineering Design NIDisk Guía de usuario descargar pdf (Pagina 33)

NIDisk User Guide

• SIGNAL can display the entire sound file (see below), which the researcher can use as a

roadmap to extract specific sound events. SIGNAL can manually extract, display,

measure, and analyze these events and store them as individual sound files. SIGNAL can

also be programmed to perform acoustic measurements automatically on the stored

events.

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Subject Microphone Record sound file in NIDisk

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Continous sound spectrogram Edit and measure sound

in SIGNAL using STRIP events in SIGNAL

The above figure illustrates this process. Following is an overview of the steps involved.

1. Present the acoustic vocalization stream to the microphone or hydrophone.

2. Connect the microphone or hydrophone to the NIDisk input panel.

3. Use NIDisk to digitize and record the vocalization stream to one or more continuous

sound files. Normally, set the NIDisk sample rate to at least 2.5 times the desired

recording bandwidth.

4. Start SIGNAL and use the STRIP command to view a continuous spectrogram of the

recorded sound file. STRIP produces a multi-screen "strip-chart" frequency-time

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Engineering Design NIDisk Guía de usuario Pagina 33