Time Selective Response
- Measure in an Office Environment without Compromising your Results
The addition of Time Selective Response (TSR) to PULSE Basic Electroacoustics Type 7797 means that PULSE now does simulated free-field measurements on loudspeakers, microphones, etc., allowing fundamental characteristics such as Impulse Response, Output Response, Frequency Response and Impedance to be determined quickly and accurately without the need for an anechoic room. Choose BZ-5742 for Harmonic Distortion measurements using TSR and BZ-5551 for Directional Response measurement, and Polar Plots.
The TSR measurement parameters such as frequency range, sweep time, time delay, time range, excitation level, etc., are easily set up via the intuitive graphical user interface. For optimal positioning of the time window, you can use either an automatic or manual approach. When using the manual approach, you can freely position the time window within the full time range of the measured impulse response and the associated frequency response will be updated. Hence the effect of applying the time window can be evaluated live in the frequency response. Derived parameters like frequency resolution, time resolution, sweep rate, etc., are also shown and can be used for optimising the setup of the fundamental TSR measurement parameters.
To further improve the signal-to-noise ratio, averaging can be used. To reduce or eliminate settling phenomena, you can apply a conditioning tone before the sweep. For acquiring a constant excitation level for a certain frequency range – for example, when using a loudspeaker to test hearing aids – you can apply output equalization.
Multichannel analysis has a wide range of applications, for example, for microphone testing when using a reference microphone. Here the microphone being tested and the reference are measured at the same time. And for loudspeaker testing, you can measure the frequency response, harmonic distortion and impedance at the same time.
You can save the measurement data produced by the TSR in PULSE Data Manager for Electroacoustics. Once data is saved, you can report, post-process and perform calculations using a predefined Microsoft® Word template for reporting, and PULSE Calculator for postprocessing and calculations.
Furthermore automation of test procedures for evaluating the acoustical performance of Electroacoustic devices can easily be performed using the PULSE Sequencer. The sequencer editor is a powerful tool that will allow creation of a complete measurement suite simply by dragging and dropping specific steps into the sequence play from where the replay of the sequence can be controlled.
PULSE Now Supports Free- and Near-field Measurements
With the addition of TSR to the PULSE Basic Electroacoustics software package – which already holds the Steady State Response Analyzer (SSR) – our range of PULSE-based Audio Analyzers now supports both simulated free-field and near-field measurements. This, in combination with the features already mentioned, will meet the requirements of any acoustical engineer working with research and development of modern audio equipment.
