TYPE 5128

High‐frequency Head and Torso Simulator (HATS)

Designed for realistic in situ electroacoustics tests on, for example, smartphones, headsets, audio conference devices, microphones, headphones, hearing aids, hearing protectors and smart speakers.

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High-frequency Head and Torso Simulator (HATS) Types 5128-C and -D are manikins with built-in realistic ear and mouth simulators that provide a realistic reproduction of the acoustic properties of an average adult human head and torso. High-frequency HATS is designed for in situ electroacoustics tests and can cover the full audible frequency range (up to 20 kHz).


  • Testing of smartphone audio performance in relation to national and international standards for communication quality. This includes testing of mobile and cordless handsets
  • Evaluation of the intelligibility of headset two-way communication in the presence of background noise and conditions that may produce feedback into the system
  • Evaluation of speech intelligibility in two-way communication using hands-free devices such as conference phones and smart speakers based on accurate production of human speech for the evaluation of directivity, intelligibility, feedback and background noise suppression
  • Facilitates the evaluation of microphone recording accuracy for human speech with variations in level, directivity and sibilance
  • Measurement of the audio response of headphones in exactly the way a human would perceive the quality. This allows designers to identify and correct anomalies in headphone design that lead to artefacts in the frequency response. The new ear canal design provides the most benefits to designers of in-ear headphones, where the geometric fit is crucial to the evaluation
  • Sound quality evaluation of hearing aids with correct anatomical positioning
  • Measurement of the attenuation and effective sealing of hearing protectors with the correct ear canal geometry and head anatomy


Type 5128-D includes Handset Positioner Type 4606. The handset positioner enables smartphone to be precisely positioned on the HATS. This results in easier test set-ups and better data quality from electroacoustic tests.