TYPE 7698

PULSE sound quality software

For designing product sound by quantifying acoustic emissions in terms of how humans respond – analysing in real-time or recording data for post-processing.

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This PULSE software analyses product sound quality using parameters that closely relate to the complete human experience of the sound, rather than using purely physical quantities such as sound pressure. The software can analyze real-time measurements using sound quality metrics such as ‘loudness’. Users can filter the sound using these sound quality parameters, to understand the value of potential changes and deliver targets in engineering terms. The software can also record sound and post-process the data, allowing the user to select valid sections of the time history, and to audition potential changes.

USE SCENARIOS

  • Real-time acoustic measurements and filtering
  • Recording time data for performing post-recording analysis and editing 
  • Benchmarking comparisons of competitor and current products 
  • Jury study evaluations and customer focus groups
  • Heavy machinery development and evaluation
  • Speech intelligibility evaluation
  • Noise annoyance investigations

SOUND QUALITY VS SOUND PRESSURE

Conventional, physical sound analysis deals with sound in the air. Sound quality metrics measure the effects our ears have on the sound before it reaches our brains, such as favouring certain frequencies. Sound quality metrics also measure how our mental processes determine how the sound affects us. Some metrics such as Zwicker Loudness attempt to understand how the human ear experiences sounds by properly weighting the different parts of the sound signal. Other metrics such as articulation index quantify factors such as how easy it is to hold a conversation near the sound source. By using combinations of such objective sound quality metrics to describe the outcomes of these complex psychoacoustic phenomena, you can reliably quantify them in a repeatable way that gives clear engineering directions.

RESULTS

You can view analysis results in terms of sound quality metrics such as ‘roughness’ or ‘sharpness’, alongside the conventional units such as sound pressure level. At the same time, the sounds can be played back, while viewing their spectral content in a spectrogram display, on a frequency scale or psychoacoustic Bark scale. Multispectra can be displayed as contour plots, 3D plots, slices and envelopes. All of these can be displayed simultaneously. A statistical analysis function calculates the correlation between objective and subjective tests.

CAPABILITIES 

  • Incorporation of sound quality metric calculations into standard sound and vibration analyses
  • Concurrent spectral and overall broadband analysis with metric calculations
  • Correlation of subjective evaluations with objective metrics
  • Transient sound events
  • Non-stationary test objects
  • Real-time filtering 
  • Custom metrics
  • Binaural and monaural sound quality
  • Psychoacoustic correction filter for accurate perception during replay

ADDITIONAL CAPABILITIES

  • An order analysis option gives sound quality-based order analysis on rotating machinery, even when the speed is not constant 
  • Psychoacoustic Test Bench gives advanced controls for replay tests and allows the subjective test methods paired comparison and semantic differential