PULSE Elektroakustik
PULSE™ Electroacoustics is a versatile platform for the evaluation of electroacoustic transducers. It includes a wide range of analysis capabilities allowing you to determine the important features of an electroacoustic device, for example, output response, frequency response, harmonic distortion, intermodulation distortion, difference frequency distortion, directivity, and loudness rating.
One unique feature is that the required measurement accuracy can be chosen prior to the measurement. Frequency responses are measured either as the analyzer input divided by the generator output, or between two different inputs. This allows accurate measurements even in noisy environments.
PULSE Electroacoustics allows automatic, real-time correction of the response of, for example, microphones, couplers, and sound sources. That means that required corrections do not have to be performed as an additional post-processing task. And, as a matter of course, corrected data can be clearly distinguished from non-corrected data.
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Manufacturers of electroacoustic equipment such as loudspeakers, microphones, telephones, headsets, hearing aids, hydrophones, etc., have, for many years, successfully developed new innovative acoustical designs and introduced these into the market in the form of high-quality products.
One important reason for this success is their ability to continuously improve the products and processes. A key element in this improvement process is the ability to measure and document the acoustical performance, during both the development and the manufacture of new products.
In the future, the ability to characterise electroacoustic equipment using traditional performance specifications such as frequency response, distortion, linearity, directivity, delay, etc., will have to be combined with a wide range of other acoustical and vibration measurements.
Acoustic and vibration measurements such as those performed in material testing, modal analysis, etc., are expected to become a very important prerequisite for continued innovation and improvement within the development and manufacturing of electroacoustic equipment. These and other applications can be performed on the same PULSE platform that runs dedicated electroacoustic applications.
DEDICATED AUDIO ANALYSIS
PULSE Electroacoustics provides a variety of tools dedicated to the evaluation of electroacoustic devices. For directivity measurements, for example, an intuitive graphical interface allows control of a turntable, and display facilities include polar plots showing the directional response of speakers or microphones. Thiele Small parameters can be calculated for testing receivers and speakers using several methods – simple impedance, added volume, added mass, or laser.
For testing of receivers and loudspeakers, predefined measurement sequences based on the PULSE sequencer are available. New, dedicated measurement procedures are easily generated by dragging and dropping specific PULSE steps into the PULSE sequencer from which the complete sequence can be launched by the push of a button. For skilled programmers, PULSE facilitates Visual Basic® for Applications enabling very advanced applications to be implemented using the PULSE measurement platform.
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EASY AND FLEXIBLE DOCUMENTATION
PULSE Audio Analyzers allow data to be displayed in a variety of ways in both the frequency and time domains. The available displays include curves, bars, overlays, contour plots, polar plots, as well as 3D waterfall displays. In all cases flexible scaling of all axes is on hand. Results can be read out using different cursors ranging from simple x-y cursors to special calculated cursors providing, for example, power in a certain frequency range or loudness rating according to different standards. Measurement results can be post-processed in a number of ways, for example using Microsoft® Excel. Special post-processing of results, such as tolerance checking, can be performed live on the data, and so provide clear pass-fail verdicts. All measurements can be fully documented using Microsoft® Word, allowing you all the flexibility you need through user-defined templates. And of course, your complete measurement, including analyses, displays, post-processing, etc., can be stored as a PULSE Project. This allows you to re-load the project and, without problem, repeat exactly the same measurements later on.
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ALL YOUR DATA IN THE RIGHT PLACE
Measurement data can be stored and retrieved from a database dedicated to electroacoustic data. This database takes data from the PULSE Audio Analyzers, but as a unique feature it also allows you to import data from Brüel & Kjær’s Type 2012 Audio Analyzer. What’s more, even data from some non-Brüel & Kjær analyzers can be imported. This allows you not only to search for and retrieve data from one place, but also to show old and new data in one and the same display, automatically scaling data correctly. A vast number of calculations and comparisons, including statistics, can be performed on data retrieved from the database, regardless of where the data originated.
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