A lot is promised and a lot can happen when it comes to audio, video and IT. With modern measuring systems and a wealth of experience, we get to the bottom of problems and verify the quality of productions or technical systems. If required, we prepare expert reports for submission to the authorities and acceptance reports (certifications) for specific areas of application.

We offer measurements and expert reports on the following topics:

Acoustics

• Sound pressure calibration and limiting LAF, LCS, LEQA and others), preparation of reports
• Limitation and sealing of sound systems (limiters, in accordance with official requirements)
• Speech intelligibility measurements (STI-PA)
• Measurement of the reverberation time (RT60) and delay
• Preparation of reports

Audio

• Quality testing and technical acceptance of systems
• Calibration of studio monitors and sound reinforcement systems for stereo, surround and immersive audio (exactly according to system recommendations from Dolby or others)
• Calibration also according to X-Curve (cinema equalization, DIN/IEC/ISO 2969)
• Measurement of audio quality parameters such as distortion and noise (THD+N)
• Analysis of analog and digital audio interfaces (AES3, MADI, SPDIF, SDI, AES67 etc.)
• Analysis of multi-channel audio bitstreams (Dolby Digital, Dolby E, DTS Digital etc.) including metadata.
• Measurement and analysis of loudness according to ITU BS.1770/1771 and various regional standards (e.g. EBU R 128, ATSC A/85, etc.)
• Testing of production quality according to the state of the art, acceptance of sound recordings
• Analysis and restoration of sound recordings

Video

• Calibration of TV sets, monitors and projectors
• Physical and logical testing of network and SDI transmission paths (jitter, level, etc.)
• Sound and image technical approval of productions in accordance with the applicable technical guidelines (e.g. TPRF of ARD/ZDF/ORF, Netflix standards, etc.) or requirements of the client.
• Preparation of reports

IT and networking

• Testing networks and cabling
• Data throughput, latency
• Measurement and documentation of Internet access for submission to RTR
• Measurement and documentation of WLANs
• Preparation of reports

Broadcast (radio, FM and DAB+)

• Measurement runs to record the transmitter range
• Technical measurement and acoustic analysis of the transmission quality
• RF level, multiplex power and peak deviation, multipath, etc. (VHF/FM)
• SNR, CNR, BER, bit rate, RF level, loudness, etc. (DAB+)
• Preparation of reports