HMS II.4 - Fullband artificial head for measurements in receiving direction only

HMS II.4 is the fullband artificial head for voice and audio quality measurements in... 

HMS II.4 is the fullband artificial head for voice and audio quality measurements in receiving direction only. It is ideally suited for testing close-to-the-ear transducers in mobile phones, handsets, ANC headphones, and headsets. In addition, the artificial head allows measurements of far-to-the-ear transducers in hands-free systems or smart speaker. The head and torso simulator provides geometric and acoustic characteristics according to recommendation ITU-T P.58 and thus replicates all acoustically relevant structures of the human anatomy.

HMS II.4 supports measurements in receiving direction only and therefore is equipped with an artificial ear but no artificial mouth. The artificial ear meets the requirements in the recommendation ITU-T P.57 and the occluded ear simulator complies with IEC 60318-4. With HMS II.4, users can create aurally-accurate voice and audio recordings for analysis with the measurement and analysis software ACQUA.

HMS II.4 is characterized by the newly introduced modular concept, which applies to all HEAD acoustics artificial heads in the field of communication and audio testing. From now on, it is possible to use one artificial head for altering applications. Users can quickly and easily change occluded ear simulators and pinnae based on their measurement task.

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HMS II.4 is the fullband artificial head for voice and audio quality measurements in receiving direction only. It is ideally suited for testing close-to-the-ear transducers in mobile phones, handsets, ANC headphones, and headsets. In addition, the artificial head allows measurements of... 

HMS II.4 is the fullband artificial head for voice and audio quality measurements in receiving direction only. It is ideally suited for testing close-to-the-ear transducers in mobile phones, handsets, ANC headphones, and headsets. In addition, the artificial head allows measurements of far-to-the-ear transducers in hands-free systems or smart speaker. The head and torso simulator provides geometric and acoustic characteristics according to recommendation ITU-T P.58 and thus replicates all acoustically relevant structures of the human anatomy.

HMS II.4 supports measurements in receiving direction only and therefore is equipped with an artificial ear but no artificial mouth. The artificial ear meets the requirements in the recommendation ITU-T P.57 and the occluded ear simulator complies with IEC 60318-4. With HMS II.4, users can create aurally-accurate voice and audio recordings for analysis with the measurement and analysis software ACQUA.

HMS II.4 is characterized by the newly introduced modular concept, which applies to all HEAD acoustics artificial heads in the field of communication and audio testing. From now on, it is possible to use one artificial head for altering applications. Users can quickly and easily change occluded ear simulators and pinnae based on their measurement task.

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Highlights

  • HMS II.4 is suitable for fullband measurements of close-to-the-ear and far-to-the-ear transducers in receiving direction only
  • The artificial head enables binaural recordings to evaluate acoustic scenarios aurally-accurate (requires optional occluded ear simulator HIS L for the left ear)
  • HMS II.4 complies with the international standards ITU-T P.57, P.58 as well as IEC 60318-4 for measurements in receiving direction
  • Modular concept allows to adapt the artificial head quickly and easily to altering measurement tasks

Applications

  • Voice quality and audio quality measurements in receive direction of e.g.:
    • Mobile phones and handsets
    • Headsets, headphones like in-ear buds, and wearables – with and without Active Noise Cancellation (ANC)
    • Hearing aids and active/passive hearing protection
    • In-vehicle applications like hands-free terminals, in-car communication (ICC) systems, infotainment systems, emergency call (eCall) devices
    • Voice-controlled smart home devices like smart speakers and other IoT devices
    • Conference phones and hands-free devices

Features

  • HMS II.4 is equipped with an impedance simulator in the right ear (HIS R) – optionally, it is possible to add an ear simulator in the left ear (HIS L)
  • Due to its modular concept, HMS II.4 is configurable as desired to fit altering measurement tasks:
    • Further variants of the occluded ear simulator are available:
      • Low-noise occluded ear simulators that feature an impedance response matched to that of the human ear for the right ear (HIS R LN HEC) and for the left ear (HIS L LN HEC)
      • Low-noise occluded ear simulators for the right ear (HIS R LN) and for the left ear (HIS L LN)
    • Pinna: HMS II.4 is equipped with two anatomically shaped pinnae (type 3.3) and can be retrofitted with simplified pinnae (type 3.4). Also, human-like designed pinnae (type 4.3 up to the reference plane) that models the section leading into the realistic ear canal are available
  • The artificial ears provide a transmission range from 3 Hz to 20 kHz
  • The artificial ears type 3.3 and 3.4 meet the requirements in the recommendation ITU-T P.57 and the occluded ear simulator complies with IEC 60318-4
  • HMS II.4 can be equipped with an artificial nose (AN-HMS); it enables acoustic measurements of audio and communication devices where a nose ensures secure hold of various devices (e.g. augmented reality glasses, virtual reality headsets)
  • The height-adjustable tripod HMT III or the torso box HTB VI are different mounting solutions for the artificial head

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