Design of the new Bruel & Kjaer High Frequency Head and Torso Simulator (HATS) type 5128
In response to the trend towards high-quality audio in mobile phones and the increasing popularity of headphones and headsets for communication and entertainment, Brüel & Kjær has developed the new High-frequency Head and Torso Simulator (HATS) Type 5128.
High-frequency HATS addresses the need for realistic, accurate and repeatable acoustic measurements across the full range of human hearing. The HATS also provides a large area of silicon rubber around the pinna to enable much better sealing of circum-aural (surrounding the ear) headphones. High-frequency HATS extends the measurement capabilities to higher frequency ranges than those in currently available head and torso simulators.
High-frequency HATS features a human-like ear canal and an occluded ear simulator that provides the correct acoustic impedance across the full frequency range. The ear simulators come with associated electronic calibration information via the transducer electronic datasheet (TEDS). By accurately replicating the audio response of the human ear, High-frequency HATS provides unprecedented precision in audio testing of consumer products up to 20 kHz. In addition, the performance of the mouth has also been improved. It now incorporates a Class D amplifier and can provide an equalized output to 14 kHz, and beyond. This significantly improves the correlation between subjective and objective evaluation of the audio performance of smart devices and accessories, ensures industry-leading audio quality for new products in the marketplace and reduces development time.
The research behind the development of this new product is discussed and the engineering to make it a reality will be discussed in the presentation.
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