Sound quality for consumer products Type 7698

PULSE Sound Quality Software Type 7698 is advanced, stand-alone software which can record, analyse, edit and play back binaural or monaural product sounds or other audio signals.


  • Analysis of product sound
  • Editing recorded sounds to simulate product improvement
  • Preparing listening tests and play lists for product evaluation
  • Determining sound quality parameters: loudness, non-stationary loudness, binaural loudness, sharpness, fluctuation strength, roughness and related parameters
  • Visualising and editing orders on rotating machinery


  • Runs under Microsoft® Windows® 2000 or XP with Microsoft® sound system compatible sound card (up to 4 channels)
  • Reads PULSE Data Recorder files
  • Controls PULSE for measurements with Data Recorder or Time Capture options
  • Powerful Zwicker Loudness analysis option BZ 5265
  • Order Analysis capabilities with option BZ 5277
  • Subjective/Objective correlation tool with Psychoacoustic Test Bench option BZ 5301
  • Jury Test tool for designing and executing sound quality listening tests
  • Psychoacoustic correction for improved realism during playback
  • Frequency and time domain editing of multiple signals with real-time capability
  • Displays multispectra as waterfalls, contour plots, envelopes and slices
  • Fully OLE programmable for automating routine tasks such as analysis and reporting
  • User-definable edits using Visual Basic® or Visual C++®
  • User-definable macros using VBScript or JavaScript
  • Performs regression analysis and creates a combination metric with Psychoacoustic Test Bench option BZ 5301

Optimisation of Sound Quality has become an increasingly important activity in the design and development of all products that emit noise, for example, automobiles, trains, aeroplanes and all kinds of household appliances.

There are two distinct reasons for optimising sound quality – firstly, to optimise the sound to satisfy the specific customer group; secondly, to increase the product’s competitiveness and sales. Most products include a variety of individual components from different sub-suppliers. These must satisfy quality requirements including those for sound performance.

The optimisation process involves the following steps:

  • Recording of sounds on site, for examples, in a car on a test track using a Head and Torso Simulator (HATS)
  • Analysing the sounds in a laboratory using both traditional methods and specific objective metrics such as Zwicker Loudness 
  • Simulating changes in the sounds using a number of edits 
  • Preparing and conducting subjective listening tests 
  • Creating product-specific Combination Metrics to cut development time and cost

Brüel & Kjær offers complete systems from the simplest to the most advanced.  

HATS_Real-time filter There are 18 different ways to edit or modify sound signals. The real-time filter tool uses IIR filters. After a parameter change you can immediately listen to the change in sound by just using the cursor
HATS_Zwicker Loudness With the Zwicker Loudness option a large number of metrics can be calculated and displayed. Here you see a non-stationary Loudness contour plot, a graph showing Total Loudness vs. Time and a table of calculated Metrics



We help our customers measure and manage the quality of sound and vibration in their products and in the environment

Brüel & Kjær Sound & Vibration Measurement A/S. P +45 77 41 20 00. F +45 45 80 14 05.
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