Daqarta
Data AcQuisition And Real-Time Analysis
Scope - Spectrum - Spectrogram - Signal Generator
Software for Windows
Science with your Sound Card!
The following is from the Daqarta Help system:

Features:

Oscilloscope

Spectrum Analyzer

8-Channel
Signal Generator

(Absolutely FREE!)

Spectrogram

Pitch Tracker

Pitch-to-MIDI

DaqMusiq Generator
(Free Music... Forever!)

Engine Simulator

LCR Meter

Remote Operation

DC Measurements

True RMS Voltmeter

Sound Level Meter

Frequency Counter
    Period
    Event
    Spectral Event

    Temperature
    Pressure
    MHz Frequencies

Data Logger

Waveform Averager

Histogram

Post-Stimulus Time
Histogram (PSTH)

THD Meter

IMD Meter

Precision Phase Meter

Pulse Meter

Macro System

Multi-Trace Arrays

Trigger Controls

Auto-Calibration

Spectral Peak Track

Spectrum Limit Testing

Direct-to-Disk Recording

Accessibility

Applications:

Frequency response

Distortion measurement

Speech and music

Microphone calibration

Loudspeaker test

Auditory phenomena

Musical instrument tuning

Animal sound

Evoked potentials

Rotating machinery

Automotive

Product test

Contact us about
your application!

SPL Response Attack

Controls: Options >> Sound Level Meter >> Attack
Macro: SPL_TCattack

This controls the Attack time of the Sound Level Meter response. Values are in integer milliseconds only.

The Attack time works with Decay as a "quasi-peak" detector. Attack controls how rapidly the meter responds to a sudden increase in level, and Decay controls how rapidly it dies down after a decrease. In general, a short Attack allows a fuller response to fast transients, whereas a longer Attack tends to ignore them.

If you set Attack to zero, regardless of Decay, the Sound Level Meter responds immediately to all changes, with no time constants. Use 1 msec for the fastest Attack that still uses a Decay value.

If you set Decay to zero, Daqarta assumes you do not want quasi-peak operation. In this case, Attack sets a single time constant configured to provide an overall averaged response.


Macro Notes:

SPL_TCattack=125 sets Attack to 125 msec. SPL_TCattack=>1 increments the current value and SPL_TCattack=>-1 decrements it by 1 msec.


See also Sound Level Meter

GO:

Questions? Comments? Contact us!

We respond to ALL inquiries, typically within 24 hrs.
INTERSTELLAR RESEARCH:
Over 30 Years of Innovative Instrumentation
© Copyright 2007 - 2017 by Interstellar Research
All rights reserved