Bedrock BTB65 TalkBox

Embedded Acoustics is the designer and manufacturer of the Bedrock BTB65.

Every STIPA measurement, whether it is with our STIPAmeter or any other device, needs a source for the STIPA test signal. The Bedrock Talkbox is the most reliable and accurate source on the market. The Bedrock Talkbox can be used as an electronic signal source by utilizing the line-out connection. Or it can be used as a calibrated acoustic signal source, due to its integrated loudspeaker. The Bedrock Talkbox is designed to accurately play the STIPA test signal, as well as several other test signals. The device features an interactive LCD touchscreen to show,which allows you to easily control all features and monitor its settings at a glance.


  • Plays STIPA test signals according to IEC-60268-16 rev. 4 (2011) and draft rev. 5 (2016)
  • Plays noise (pink, white), sine waves (125 - 8000 Hz) and sweeps.
  • Also plays back calibrated speech signals, to announce the beginning and end of tests and to obtain a subjective impression of speech intelligibility while testing (male and female speech, US, UK, SP, FR, GE, NL).
  • Signals are played back with automatically calibrated spectrum and level (no user calibration needed - optional adjustment of nominal level).
  • Can also be used as an electronic signal source through the featured line-out jack.
  • Has a 3.5mm jack line-in to use the TalkBox as a powered loudspeaker with computers and smartphones.

Technical specifications

  • Loudspeaker frequency range 20 - 15,000 Hz
  • Plays back signal at a standardized (calibrated) signal levels of 54-72 dB(A) @ 1m
  • Signal level can be increased/decreased relative to nominal level to test dynamics
  • Powered through external power supply (included)

The Bedrock Talkbox has a manufacturer suggested retail price of f €850,- excl. VAT. 

Where to buy?

You can buy the SM50 through any of our distributors, or straight from usIf you are interested in purchasing multiple instruments at once, would like us to quote for a specific configuration, or if you need alternative payment options, please contact us via email:


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