Easy to use. Reliable. Affordable.

Bedrock AM100

Bedrock AM100

Class 1 acoustic instruments, redefined

The Bedrock AM100 is our brand new flagship instrument. With its sleek and rugged alloy-and-glass design it is certainly an eye-catcher – but more importantly, it is a very powerful and full-featured class 1 instrument. From wireless connectivity over Bluetooth and Wifi to a second input channel and a built-in signal generator, the AM100 has it all.

Our SMxx product line

Our SMxx product line

A measuring tool for every budget and application

The Bedrock brand stands for high-quality, high-end measuring equipment for acoustics and professional audio. Our products combine the ease of use of a smartphone with the highest professional and scientific standards of performance and accuracy. Our devices are designed by our own team of scientists and engineers, and built in our own production facility in the Netherlands.  

Intuitive touch interfaces

Intuitive touch interfaces

Professional measuring instruments, made as easy to use as a smartphone

Too many measuring instruments require extensive training and hours of practice, just to get the hang of the user interface. Bedrock devices are different: easy to use and easy to learn. The experience of working with our instruments is similar to working with a smartphone - but always knowing that you have the power of a professional measuring instrument at your finger tips.

The ultimate speech intelligibility meter

The ultimate speech intelligibility meter

Made by the inventors of STIPA

STIPA has become the industry standard for measuring speech intelligibility.  The Bedrock SM50 STIPA meter is the device that many have been waiting for: finally a STIPA meter that is accurate, reliable and affordable at the same time! Designed from scratch by the very team that invented STIPA.

An acoustic test signal source you can bring anywhere

An acoustic test signal source you can bring anywhere

The Bedrock BTB65 TalkBox

Whether it is for STIPA testing, measuring loudspeaker transfer functions or reverberation times: you'll always need an acoustic test signal source. The Bedrock BTB65 is small and light, but it packs an impressive punch: not just as a simulated talker, but also (through is balanced line-out) as an electric test signal source.  

Worldwide support and warranty

Worldwide support and warranty

We're there if you need us

Whether or not we have a local distributor or agent in your region, we'll be there for you when you need us. Regardless of what time zone you are in, most questions are answered (and most issues are solved) within 24 hours. Also, all products are covered by our extensive worldwide pick-up&return warranty programme.


The brand new Bedrock AM100

Our new flagship instrument: the Bedrock AM100.


For those of you who new we were working on this: we're sorry to have kept you waiting! But the final result will not disappoint. The Bedrock AM100 continues the development of easy-to-use and versatile measuring tools, progressing several steps at once.  Its design, based on glass and alloy parts, is eye-catching as well as extremely durable. The 4" high-resolution capacitive touch display makes the device extremely easy to work with.

We added many new features, such as wireless connectivity (Bluetooth and Wifi), a second input channel, a headset jack and an internal signal generator. We also upgraded the specs in every possible way, from dynamic range to internal storage space and battery life.

We could talk about the AM100 for hours, but you should really see it for yourself - our distributors and dealers are happy to tell you all about this new product, and so is our This email address is being protected from spambots. You need JavaScript enabled to view it. More information about the AM100 is also found here.



Acoustic calibrators are now added to our product line-up


Acoustic calibrators enable you, as a user of acoustic measuring instruments, to verify the level calibration of your instrument, and make adjustments if needed. It is considered "good laboratory practice" to do this before and after every measuring session. Even though are microphones are exceedingly stable, it is still a good idea to adopt this measure as a precaution.

We offer two product versions: BAC1 and BAC2 (respectively for class 1 and class 2 devices). The devices are easy to operate and require very little maintenance. Each device comes with a calibration certificate issued by an external accredited laboratory. The Bedrock BAC2 (class 2 version) comes complete with an adapter for our standard class 2 microphone (BAMT2).




Get the most out of the SMxx instruments with our MS Excel tools

As many of you will know, we offer a series of tools for importing data from the Bedrock SMxx instruments (SM30/SM50/SM90) into MS Excel. You will need a recent version of MS Excel (2010 or newer). 

These import tools read multiple output files from the SM50 (STIPA, SLM and RTA mode) and convert these into a manageable table. You can also use the tools to easily browse through the measurements. The files can be downloaded here.

There are many different combinations of Excel versions, Windows versions and software that interacts with Excel. We've tested the tools on the most common combinations, but we can't rule out that some people might get unexpected results. So please review your data carefully when you first use these files. Unfortunately, for now, the tools usually do not work in Mac OSX (theoretically, as long as you have VB installed, it should work - but in practice this is not always the case).

Your feedback is as always appreciated; all bug reports are (as usual) gratefully received and used in future updates.


Firmware 2.6 now released. This is our biggest update yet!

Firmware version 2.6 for the SM30, SM50 and SM90 has been released. As always, the new firmware adds exciting new features to your instrument - and as always, it's free. Firmware 2.6 adds five completely new modules: 

  • THD+N (analyze distortion and noise in electro-acoustic systems)
  • Frequency estimation (measure the fundamental frequency of complex waveforms)
  • Insulation (measure airborne sound insulation in buildings according to ISO-16283, ISO-140 and ASTM E332)
  • SRI/STC (measure the Sound Reduction Index R'w and the Sound Transmission Class; ISO-717 and ASTM E413)
  • STIPA averaging: measure STIPA and average across multiple measurements

We also implemented improvements to various modules:

  • The STIPA Pro and Full STI modules can now take background noise from any measurement, not just the last one.
  • SEL (Sound Exposure Level) was added to all SLM modules (SPL, L%)
  • The "impulse" time weighting was added to all SLM modules 
  • L% now also stores SEL,LMAX, LMIN and LEQ
  • LAEQ logging module now also has the option to display C/Z-weighted levels

A few changes and additions apply to every module on the device (through system settings):

  • Added "Delayed start" option
  • Added"measure continuously" option

Also, as usual, we gladly incorporated feedback from users who pointed out minor glitches and inefficiencies in the user interface. We also fixed some minor bugs and enhanced the stability of the USB interface during transfer of large amounts of data.

To top it all of, we released updated versions of all of our Excel tools. An Excel tool for download and analysis is now available for every module on the SMxx.

The update package can be downloaded here (note that logging in is no longer required).  The manual has also been updated. As always, the update is free for all existing and new owners of the Bedrock SMxx.

Your feedback  and bug reports are (as usual) gratefully received and used towards future updates.

If standard devices don't cut it, simply get a Bedrock device customized!

The Bedrock philosophy is simple: anything we build is designed to be easily customized. Take our digital signal processor, the DSP500 series. Even the standard model comes with plenty of options. But since we've built this around our own signal processing chip, our BSP64, there's nothing you could think of that our team cannot make.

Continue Reading

The Bedrock SM50: speech intelligibility meter, and more...

The Bedrock SM50 is the first Speech Transmission Index meter that has been completely developed and designed by the inventors of STIPA.  The design is based on a simple philosophy: we wanted to create the best and most accurate STI measuring instrument there is, while making it very easy to use at the same time. 

 A unique measuring instrument

The SM50 is not only a Speech Transmission Index meter, but also a fully compliant class 2 / type 2 sound level meter (IEC 61672, ANSI S1.4) and a class 0 real-time analyzer (IEC-61260). Not to mention a RT60 meter, LAEQ logger and oscilloscope. Even seasoned acoustical engineers and audio professionals tell us that those features are really everything they need in their day-to-day work.


More info is found elsewhere on this website.





Copyright © 2021 Bedrock Audio BV. All Rights Reserved. Bedrock Audio is a registered trademark.

Our general conditions are found here. KvK / Chamber of Commerce The Hague nr 72892692.