This is a dummy head equipped with a simulated mouse and a low-noise right ear simulator. It is particularly suitable for measuring very low sound pressure levels.
HMS II.3 LN is a dummy head that is ideal for low noise measurements in the field of calls under realistic conditions. It is equipped with pseudo ears and a pseudo mouth. It conforms to the shape and acoustic characteristics requirements of ITU-T Recommendation P.58, making it suitable for measurement scenarios both near and far from the ears. It can be used for testing transducers and signal processing for handsets, headsets, headphones, hands-free devices, voice-operated devices, hearing protection devices, and more.
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basic information
Shape and acoustic characteristics compliant with ITU-T Recommendation P.58 Modular design for easy retrofitting of compatible components Shape of head and torso simulator compliant with IEC 60318-7 Ear simulator: › Anatomically shaped pinna for comprehensive measurements in both near and far sound fields › Ear simulator compliant with IEC 60318-4 › Pinna simulator compliant with IEC 60318-7 › 3.3 type pinna simulator compliant with ITU-T Recommendation P.57 › High-sensitivity condenser microphone characterized by very low inherent noise floor and high upper limit › TEDS support (IEEE 1451.4 Class MMI) Pseudo mouse: › Low distortion 2-way design with ultra-wide frequency range (up to full band) › Acoustic characteristics compliant with ITU-T Recommendation P.58 › Digital equalization by ACQUA
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Applications/Examples of results
Measurement targets: › ANC headset › In-vehicle ANC system › Handset › Hands-free device › Hearing aid › Voice-operated equipment › In-car communication (ICC) device
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Company information
HEAD acoustics Japan Co., Ltd. has been active as a leading company in the fields of dummy head-related recording and playback systems, acoustic analysis based on human auditory characteristics, and communication measurement technology for over 25 years. HEAD acoustics has consistently been a pioneer in developing innovative technologies such as dummy head-related binaural technology, acoustic analysis related to human hearing, interactive sound simulation systems, and transmission path analysis. HEAD acoustics will continue to focus on research and development through collaboration with universities and other research institutions and participation in international research projects.