Aurally-Accurate Signal Analysis

Aurally-Accurate Signal Analysis

This range of binaural measurement, acquisition and analysis software is an ideal tool for acoustic analysis and real life playback. All psycho acoustic parameters can be measured and analysed to help with getting rid of unwanted noises in manufactured products.

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Why Artificial Head Measurement Technology?

Covering up the ears is an unlikely approach to evaluating sound. Yet this is what conventional analysis techniques in acoustic and vibration measuring technology actually amount to. This is because recordings made with conventional measurement microphones are not appropriate to aurally-equivalent evaluation of sound situations, since essential acoustic information, such as the spatial constellation of sound sources and the selectivity of aural perception, cannot be captured. Yet it is actually the three-dimensional localisation of sound sources and the way acoustic signals are processed by the human auditory apparatus which are vital factors in how sound is perceived.

Humans are able to localise a sound source spatially. Human hearing completes this localisation automatically, based on the delay and level differences of the acoustic signal at either ear. This is because the outer ear produces directionally dependent filtering of the sound signal. The filter effect is based on modification of sound wave propagation through attenuation, diffraction, reflection and resonance. In this process, the geometrical (anatomical) characteristics of the head and shoulder, along with the ear pinna, play a decisive role. The ability of human hearing to select individual sound sources when exposed to a noise back-ground is also based on the ability to localise.

Binaural hearing cannot be simulated by using an arrangement of two measurement microphones as "ears". Aurally-accurate, true-to-the-original recordings are only possible by taking account of the acoustic filtering properties of the head and ears.

The characteristics of human hearing are very different from those of conventional sound sensors. Signal processing in the human ear, involving identification of amplitude distribution, spectral composition and time structure, is extremely complex. The listener perceives a comprehensive auditory impression of an acoustic event.

At the same time, as listeners, our acoustic memories are very short. The Artificial Head measuring technology which HEAD acoustics has developed allows aurally-accurate recording of acoustic signals, together with storage of acoustic events. Playback of an Artificial Head recordings creates the same auditory impression as if the listener had been able to experience directly the original sound event.

Through true-to-the-original recording and playback of any sound event (including digital storage of these sound events) this system can be used to complete and document comparative, aurally-equivalent evaluation of a wide range of sound situations. At the same time, the compatibility of Artificial Head technology to conventional measuring technology means that subjective and objective sound field analysis can be combined in a single investigation.

HMS IV Artificial HEAD Measurement System

HMS IV Artificial HEAD Measurement System

The HEAD Measurement System IV is a stand-alone, mobile measuring device that is ready to perform aurally accurate binaural recordings immediately after powering up.

The recordings can be saved directly to a CompactFlash card, allowing stand-alone operation without a notebook or PC. Via the integrated headphone output, the recordings can be played back immediately with aurally accurate equalisation.

 

Applications:

  • Examination and optimisation of the sound quality of technical products: motor vehicles and car components, domestic appliances, office machines and power tools
  • Binaural measurements in product development and quality control
  • Sound design and product optimisation

 

HSU III HEAD-Shoulder-Unit

The HEAD-Shoulder-Unit HSU III is an artificial head microphone for binaural recordings. It is used in the same way as conventional measurement microphones and can be connected to all front ends via conventional measurement inputs.

 

Applications

  • Binaural measurements
  • Sound quality research and product optimisation
  • Sound Diagnosis
  • Sound Design
HSU III HEAD-Shoulder-Unit
HSU III.2 Head-Shoulder Unit with ICP® microphones for binaural recordings

HSU III.2 Head-Shoulder Unit with ICP® microphones for binaural recordings

The Head-Shoulder Unit HSU III.2 is an artificial head ICP® microphone for binaural recordings. It is used like conventional measurement microphones and can be connected to any frontend with ICP® inputs.

 

Applications

  • Binaural measurements
  • Sound quality research and product optimisation
  • Sound Diagnosis
  • Sound Design

HSU III.3 HEAD-Shoulder-Unit for the measurement of very low sound pressure levels

The HEAD Shoulder Unit HSU III.3 is an artificial head microphone for binaural measurements of sound events with very low sound pressure levels. The artificial head geometry is a mathematically describable simulation of the human head and shoulder geometry. HSU III.3 enables an aurally-accurate recording of sound incidents, in which all the characteristics of human aural perception, especially spatial hearing, is supported.

 

Applications

  • Aurally-accurate, binaural measurements of sound events with very low sound pressure levels, as for instance in the IT industry
  • Sound Design
  • Quality control
HSU III.3 HEAD-Shoulder-Unit for the measurement of very low sound pressure levels
BHM III.2 Binaural Head Microphone

BHM III.2 Binaural Head Microphone

The binaural head microphone BHM III.2 is a recording system designed for making binaural measurements in places where no artificial head can be used, e.g. for recordings at the driver's position in a moving vehicle. Binaural head microphone with 2 condenser measurement microphones and Lemo plugs.

 

Applications

  • Binaural measurements without artificial head
  • Special measurement tasks
  • Measurements at the driver's position of a vehicle
  • For environmental protection and occupational safety

BHM III.3 Binaural Head Microphone

The binaural head microphone BHM III.2 is a recording system designed for making binaural measurements in places where no artificial head can be used, e.g. for recordings at the driver's position in a moving vehicle. Binaural head microphone with 2 ICP® microphones and BNC plugs.

 

Applications

  • Binaural measurements without artificial head
  • Special measurement tasks
  • Measurements at the driver's position of a vehicle
  • For environmental protection and occupational safety
BHM III.3 Binaural Head Microphone
BHS II Binaural Headset

BHS II Binaural Headset

Binaual recording and playback units for easy and affordable aurally-accurate recording. The binaural headset BHS II is a headset/microphone unit for SQuadriga II and SQobold. It can also be connected to other ICP® front ends (only recording) via the adapter CLB I.2.With BHS II, binaural recordings become very simple. The user wears BHS II like a headphone. Connected to SQuadriga II or SQobold the headset can be used not only for recordings but also for the playback of sound files.

HEAD VISOR System for Real-Time Identification

HEAD VISOR is an innovation from HEAD acoustics GmbH in the area of microphone array technology that suits localisation, visualisation, quantification and auralisation of sound sources. HEAD VISOR literally allows you to expand your senses and to handle acoustic tasks in a completely new way. Immediately after turning the system on, you will see a video image with a synchronously superimposed high-resolution map of the sound sources. The influence of modifications, analysis settings etc. can be monitored directly. You don't even have to start a recording. Thanks to the FreezeBuffer, sound events can be conveniently captured and analysed even retroactively.

HEAD VISOR System for Real-Time Identification
HEADlab Modular Multi-Channel Front-End System

HEADlab Modular Multi-Channel Front-End System

The modular multi-channel frontend system HEADlab consists of a controller and your choice of various power supply and signal modules. It allows you to set up your very own custom recording and playback system.

labCOMPACT12 and labCOMPACT24

Based on our HEADlab technology, the convenient “single-module" systems combine the basic functionality of a controller with one or two 12-channel input module(s), resulting in compact recording devices.

 

Download brochures:

labCOMPACT12

labCOMPACT24

labCOMPACT12 and labCOMPACT24
SQuadriga II Recording & Playback System

SQuadriga II Recording & Playback System

SQuadriga II is a recording and playback system for a wide range of measurement tasks. A plethora of connection options, its low weight, and its powerful rechargeable battery make it a highly versatile and mobile device.

SQuadriga III Mobile Recording & Playback System

SQuadriga III is a mobile measurement system, with a multitude of applications. The compact dimensions, powerful battery, and wide variety of connectivity options offer versatile functionality, high mobility, and variable applications.

SQuadriga III Mobile Recording & Playback System
SQobold Mobile Four-Channel Measurement System

SQobold Mobile Four-Channel Measurement System

SQobold is a mobile four-channel measurement system with a built-in rechargeable battery. Its touch screen can be used, for example, to display psychoacoustic analyses. SQobold can also be used as a sound level meter and for aurally accurate playback.

BEQ II Two-Channel Frontend

BEQ II is a two-channel frontend for connecting condenser microphones or ICP® sensors. In addition, it provides separate pulse inputs, e.g. for the acquisition of rpm data.

 

Download brochures:

BEQ II.0 - Mobile Frontend

BEQ II.1 - Digital Equaliser

BEQ II Two-Channel Frontend
SCU Signal Conditioning Unit

SCU Signal Conditioning Unit

By means of our signal conditioning unit SCU-P2 you can improve the quality of your pulse signals and convert them to a TTL signal shape. The adapter SCU-V2 allows you to connect high-impedance sensors to front ends like SQuadriga II or labV6.

 

Download brochures:

SCU-V2:Adapter for connecting high-impedance sensors 

SCU-P2: Adapter for pulse signal conditioning

ArtemiS SUITE - Signal Analysis Software

ArtemiS SUITE - Signal Analysis Software

ArtemiS SUITE is a software platform for measuring and analysing sound and vibration with the aim of optimising product and environmental noise. Universal multi-channel software for all fields of sound and vibration analysis (data acquisition, analysis, playback, reporting, data management). The modularly structured software solution combines several tools in a standardised software environment and is the ideal tool for tasks such as:

  • Recording sound, vibration and other variables such as temperature, stresses and torque
  • Recording and decoding bus data such as CAN, CAN-FD and FlexRay
  • Documenting recordings with user-defined metadata
  • Playing back recordings
  • Modifying recordings in time range
  • Analysing recordings using varied analysis algorithms and sophisticated representation tools
  • Implementing standardised tests for validation tasks including WYSIWYG reporting and Powerpoint® exporting
  • Data management and metadata-based searching

 

With the Compact Analysis (ASM10) beginner module, various tools for troubleshooting and product validation, and interfaces for system integration (ASX 00-ASX 03) and extension options, the ArtemiS SUITE software platform is well-equipped for all popular application scenarios. With its uncluttered design and intuitive user concept, ArtemiS SUITE facilitates a fast and efficient workflow.

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