HRR I – Rotating reflector for changing the echo path for acoustic tests

HRR I is the HEAD acoustics motorized rotating reflector to influence the acoustic... 

HRR I is the HEAD acoustics motorized rotating reflector to influence the acoustic coupling between loudspeaker and microphones during acoustic tests. Thus, the reflector allows users to quickly change the acoustic echo path, a typical situation e.g. in hands-free communication – in a fully automated and repeatable way.

HRR I is suitable for any hands-free situation and any location as an automated and noise-free acoustic reflector. The aim of HHR I is to identify and subsequently optimize the system’s general communication quality and echo attenuation performance under quickly changing acoustic conditions.

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HRR I is the HEAD acoustics motorized rotating reflector to influence the acoustic coupling between loudspeaker and microphones during acoustic tests. Thus, the reflector allows users to quickly change the acoustic echo path, a typical situation e.g. in hands-free communication – in a... 

HRR I is the HEAD acoustics motorized rotating reflector to influence the acoustic coupling between loudspeaker and microphones during acoustic tests. Thus, the reflector allows users to quickly change the acoustic echo path, a typical situation e.g. in hands-free communication – in a fully automated and repeatable way.

HRR I is suitable for any hands-free situation and any location as an automated and noise-free acoustic reflector. The aim of HHR I is to identify and subsequently optimize the system’s general communication quality and echo attenuation performance under quickly changing acoustic conditions.

More Less

Highlights

  • HRR I enables to dynamically change the acoustic coupling between receiver and microphones
  • The motorized rotating reflector allows precise & fully-repeatable time-variation of the echo path
  • HRR I is used for acoustic tests of hands-free devices like smart speakers, conferencing devices, car hands-free and mobile devices with hands-free telephony function

Applications

  • Fully-automated dynamically changing the echo path for acoustic tests of hands-free devices like smart speakers, conferencing devices, car hands-free and mobile devices with hands-free telephony function
  • Time variant echo path measurements e.g. according to Recommendations ITU-T P.1100, P.1110, and P.1120

 

Features

  • The rotating reflector can be applied in living spaces, test rooms, vehicles etc.
  • The motorized rotating reflector stands out with its noise-free motion with high precision
  • In conjunction with appropriate ACQUA test suites (e.g. P.1100, P.1110, HQS-SmartHome), HRR I allows fully-automated operation
  • Trigger pulses are stored with the audio file to achieve accurately timed and fully repeatable measurements
  • The rotating reflector provides high mechanical robustness and excellent acoustic reflectivity up to high frequencies
  • The motor of HRR I is mechanically decoupled from panel and pedestal to prevent undesired sound transmission from the power train
  • The large aluminum baseplate of the rotating reflector allows steady positioning on flat surfaces
  • Users can mount HRR I also on tripods via the integrated tripod socket to operate vertically as well as horizontally
  • The rotating reflector communicates with the hardware platform labCORE over the RS-485 serial connection
  • HRR I is a lightweight 40 cm × 30 cm (16 inch × 13 inch) panel

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