B R Ü E L & K JÆ R ® Electroacoustic Solutions Head and Torso Simulator Types 4128-C and 4128-D Handset Positioner for HATS Type 4606 Head and Torso Simulator (HATS) Head and Torso Simulator Types 4128-C and -D are manikins with built-in mouth simulators and calibrated ear simulators (according to IEC 60318–4 and ITU-T Rec. P.57 Type 3.3) that provide realistic reproduction of the acoustic properties of an average adult human head and torso. They are ideal for performing in situ electroacoustic tests on, for example, telephone handsets (including mobile and cordless), headsets, audio conference devices, microphones, headphones, hearing aids and hearing protectors. Handset Positioner for HATS Handset Positioner Type 4606, with pressure/force and position readouts, allows accurate, repeatable mounting of telephone handsets on HATS in both standardized and user-defined positions. This makes HATS into a state-of-the-art telephone test rig for measurement according to ITU-T recommendations. Uses and Features Uses • Testing of headphones • Evaluation of close-talking/noise-cancelling microphones • Measurements on telephone headsets and hands-free communication devices • Measurements on mobile and domestic telephones • In situ/insertion measurements on hearing aids • Testing of hearing protectors Additional Uses When Using the Handset Positioner*: • Accurate, repeatable positioning of telephone handsets on HATS for electroacoustic measurements • Testing of almost all telephone handset designs • Measurements in standardized positions according to ITU-T Rec. P.64 Type 4128-D or Type 4128-C with optional Type 4606 Features • Provides accurate acoustic representation of the average human adult • Complies with the acoustic requirements of ITU-T Rec. P.58, IEC 60318–7† and ANSI S3.36 • Highly representative mouth simulator based on ITU-T Rec. P.58 • Highly representative calibrated ear simulator based on IEC 60318–4‡ and ITU-T Rec. P.57 Type 3.3 • Includes pinnae complying with ITU-T Rec. P.57 (harder pinnae are available) • Adjustable neck angle to permit realistic posture • Individual calibration data supplied Additional Features When Using Type 4606 • Adaptable for a wide variety of telephone handset types • Simple to configure for both standardized and user-defined mounting positions • Graduated adjustment in three planes about the ear reference point • Spring-loaded mounting of the handset against the ear with adjustable pressure force • Positioning on both ears simulating right- and left-handed handset users (with Type 4159-C)

Introduction Head and Torso Simulator (HATS) Type 4128-C consists of a head mounted on a torso, representing the international average dimensions of a human adult. In airborne acoustic measurements it provides the correct simulation of the acoustic field around a human head and torso. You can use HATS free standing, fitted on a tripod, or on a turntable using a tripod mounting adaptor. HATS includes a mouth simulator and Right Ear Simulator Type 4158-C. Left Ear Simulator Type 4159-C is available for binaural measurements. HATS has an adjustable neck that allows you to position the head in a...

The Mouth Simulator Fig. 3 Reference points of the HATS mouth simulator Mouth Simulator Mouth Adaptor Center of Lip (CL) Mouth Reference Point (MRP) Equivalent Lip-plane Ref. 25 mm Microphone 6 mm Holder 080284 The HATS mouth simulator has a high-compliance loudspeaker that gives powerful low-frequency response and low distortion. The acoustic transmission path from the loudspeaker to the mouth opening ensures an easily equalized frequency response of the sound pressure level in front of the mouth. The equivalent lip-plane containing the ITU-T centre of lip (CL) is 6 mm (.24″) in front of the...

The handset can be pressed against the HATS pinna with adjustable force (0 – 18 N) by the handset positioner. This is done using a screw adjustment that allows you to set the force via a scale graduated in newtons. The resulting deflection of the pinna and the movement of the handset ERP occur along the axis formed by the nominal ERPs of the left and right HATS pinnae. The deflection can be read off the handset positioner that is graduated in millimetres. Type 4606 is also easy to set up for standardized measurements. A standardized position, the “HATS position” as defined in ITU-T Rec. P.64,...

Likewise, the quality of hands-free applications such as video conference and laptop VoIP call technologies can be measured intensively for codec optimization, sidetone tracking, noise cancellation, etc. Types 4128-C/D enable full duplex operation (simultaneous receive and transmit) for simulation of real-life communication situations. Fig. 9 Hearing aid fitted in left ear mould simulator Fig. 10 HATS being used for in-vehicle measurements Fig. 11 HATS can also be used for evaluation of integrated helmet systems Fig. 12 Stereo earphone mounted in HATS pinnae Hearing Aid Measurements Both in-the-ear...

Fig. 13 Example of setup for telephone testing Telephone Measurements HATS can be used as a representative manikin for in situ evaluation of telephone equipment including handset telephones, hands-free telephones, and group audio terminals or headsets. With both an ear simulator and mouth simulator, you can investigate, receive, and transmit acoustic sidetone and background noise characteristics for the full range of audio terminal devices. Full duplex operation is possible. 4128-D Head and Torso Simulator Several telephone test software and hardware solutions are available; for up-to-date descriptions...

Compliance with Standards The CE marking is the manufacturer's declaration that the product meets the requirements of the applicable EU directives RCM mark indicates compliance with applicable ACMA technical standards – that is, for telecommunications, radio communications, EMC and EME China RoHS mark indicates compliance with administrative measures on the control of pollution caused by electronic information products according to the Ministry of Information Industries of the People’s Republic of China WEEE mark indicates compliance with the EU WEEE Directive Safety EN/IEC 61010–1: Safety requirements...