Real Time Analysis (RTA)
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Sound Lab RTA Software for Windows
Click to see Enhanced Features

TEF-The measurement platform
You've come to know TEF as the powerful hardware platform that supplies wide-ranging sound analysis tools in a single easy-to-use package. Now, TEF Product's Sound Lab Real Time Analysis (RTA) software works with the TEF analyzer to perform Real Time Analysis. An independent module of Sound Lab, RTA brings you powerful multiple options for measurement and display.
RTA-A sound reason to choose TEF
With Sound Lab RTA, you can choose 1, 1/2, 1/3, 1/6 and even 1/12 octave band measurements, the latter ideally suited for use with a parametric equalizer. Sampling bandwidths of 24, 12, 8 or 6 kHz let you choose a desired frequency range, even down to 25 Hz in 1/12 octave measurements. In addition, Sound Lab RTA's ability to difference two input signals, allows you to use a program source as the test signal so that you can monitor a live performance.
Choose from three modes of real-time averaging for computing results. Exponential averaging, the traditional RTA method, gives more weight to the most recent data. Accumulated averaging measures the accumulation of all energy measured and is useful for observing the distribution of total energy over a period of time. Stable averaging performs an RMS average for the time or number of samples you select, with all data collected having the same weight. This allows you to measure in several locations in one room and quickly average the results.
Powerful features for viewing collected data include the ability to specify 3, 6, or 12 dB per division increment displays for maximum detail or dynamic range. In addition to the traditional Flat setting, data can be viewed with your choice of A, B, or C weighting applied. Other display features are peak hold, screen freeze, overlay and difference mode.
New display capabilites
The new 3D RTA waterfall display allows a time history of successive RTA samples to be displayed. This mode allows you to capture a fixed time duration or to show a continuously updating display. This is ideally suited for spotting resonant modes in a room or for visualizing the decay times at different frequencies.
RTA - Enhanced - Improving the RTA function
This module now contains many enhancements that previously did not exist in this product. This includes a two channel difference mode with adjustable time delay, a high resolution FFT and an alternative display mode which provides the ability to manage and compare RTA data in a more efficient manner.
Several common controls have been added onscreen in order to simplify the process of making measurements and to eliminate the need to hunt through menus and dialog boxes in order to control the display. We have also produced an attractive and updated look that includes gradients and textures, while retaining the original screen style as a selectable option for the traditional TEF user.

  Download the User's Guide for the New Enhanced RTA. 860K.
You will need a copy of the Adobe® Acrobat® Reader to view it.

Maximum sound measuring flexibility
All of these features combine to give you maximum flexibility and capability when you use RTA software with your TEF analyzer. To speak with the TEF sales department, call 203-938-2588.

Measurement type
Real time analysis derived from an 8,192 point FFT. Meets ANSI* band requirements for an extended range 1/3 octave and one octave real time analyzer
Selectable bandwidth-24, 12, 8 or 6 kHz
1, 1/2, 1/3, 1/6, and 1/12
Response time
Response times given are for 24 kHz bandwidth. As bandwidth is reduced, response time increases by the same factor.
Fast: Averaging time of 171 milliseconds (corresponds approximately to the fast setting on a sound level meter)
Slow: Averaging time of one second (corresponds to the slow setting on a sound level meter)
Long: Averaging time of 10 seconds
(Note: Slow and Long averaging are exponential.)
Accumulated: Measures accumulation of all energy measured
Stable: Performs an RMS average for the time or number of samples specified, all samples during that sample time equally weighted
Exponential: Performs an exponential average of the measured data, giving more weight to most recent data
A, B, C or Flat weighting can be applied to measurements. Filters are ANSI type III.
dB/division: 3, 6 and 12 dB; 5 and 10dB
Graph type
Bars or 3D record over time
Mode indicated on screen
Peak hold
Displays the highest level recorded in each frequency band
Difference mode
Shows difference between a measurement and the data in the reference memory
Input difference
Displays the real time difference between two inputs
Screen overlays for any combination of measurements: memory, stored files, or live data
 Pink noise
A synchronized pink noise is enabled by menu or function key
Displays magnitude in dB for the selected frequency band
Data storage
Data storage limited only by hard drive or floppy disk. Typical file size: 1500 bytes.
Function keys
Quick access to frequently used commands
Configuration files
Storage and recall of global parameter settings
TEF requirements
Works with TEF25, TEF20 HI and TEF20 SHIP
Computer system requirements
Microprocessor - Pentium class
RAM - 16 megabytes of available memory
Monitor - VGA (640x480)
Hard disk - 10 megabytes for installation
CD-ROM - 4X minimum
Operating system - Windows 95, 98, 00, Me, NT or XP
Netscape or Internet Explorer 4.0 for on-line manual
FOR TEF20's -
Interface, parallel - One bidirectional 8-bit parallel port. Must be assigned as LPT1 or LPT2
Interface, host - One 8-bit ISA expansion slot for TEF20(HI-PC card)
* American National Standards Institute
®The trademark SOUND LAB is licensed under United States Trademark Registration No. 1,424,678 and 1,732,027.


RTA Bargraph

VIEW DATA IN 1, 1/2, 1/3, 1/6 AND 1/12 OCTAVE.


RTA Waterfall


top TEF Home TEF25 TEFKITS Software Accessories TEF Talk TEF Tips Price List     Sales Tech Support
To speak with the TEF Sales Department, call 203-938-2588.