Cost-effective and easy-to-use signal source for STIPA testing
In order to carry out STIPA or Full STI measurements, of course you need an STI
analyzer, such as the Bedrock SM50 or AM100. But the only way to get reliable
test results is to also use an accurately calibrated signal source: the Bedrock BTB65
TalkBox. This device provides STI signals as well as a variety of other acoustic test
signals. When performing tests, it is simply placed in front of the tested system’s
microphone instead of a human talker. The BTB65 is designed for accuracy and
reliability, but also for ease of use. The touch screen interface makes it easy to control,
and various features (such as an integrated laser pointer to assist in alignment) make
testing easy and simple.
What is Bedrock?
Bedrock produces innovative
acoustic measuring instruments
for acousticians, audio specialists,
architects, consultants, engineers
and basically anybody involved
in (acoustic) testing and
certification.
All Bedrock products are
designed and manufactured in
the Netherlands, by the inventors
of STIPA.
Why choose the BTB65?
The standards that define how STI tests need to be carried out require that a calibrated loudspeaker is used as a signal source. A very elaborate and strict set of specifications is imposed on the loudspeaker, and with reason. Calibrating the signal source is crucial to the accuracy and succes of any STI test. From a technical
perspective, it is by far the hardest
and most time-consuming step
in setting up an STI test. Unless
you use the Bedrock BTB65, in
which case the device does all this
work for you. It makes sure that
the test signals are reproduced
with the correct sound level and
spectrum, and that the STIPA
signal complies exactly with the
standard.
The BTB65 is extremely easy to use. It features a simply and intuitive touch display, which lets you control all device features without having to go through complex multi-level devic menus. All features can be seen at a glance, and controlled with a single touch.
If you need a calibrated electronic output signal instead of an acoustic signal, you can use the balanced line out on the back of the device (in parallel with the loudspeaker, if you like). Or you can choose to use the TalkBox simply as an accurately calibrated loudspeaker through its line input. The handy
integrated laser pointer helps you
to align the tested microphone
with the loudspeaker axis in a
matter of seconds.
Product features
The Bedrock BTB65 TalkBox offers the following
features:
- Playback of STIPA and full STI signals according to IEC- 61268 rev. 4 (2011) and rev. 5 (2020).
- Playback of noise signals (pink/white) for quick evaluation of frequency transfer functions
- Playback of sine waves and sweeps
- Spoken messages for
announcing the beginning
and end of test sessions
(also to be used to obtain
a subjective impression of
speech quality) in 6 languages
(US/UK/FR/SP/GE/DU),
each in a male and a female
voice.
- Full-colour 3.2" LCD touch screen
- Balanced XLR line output (calibrated in dBU)
- Phantom power XLR line/mic input
- Line input (3.5mm jack), e.g.
for audio input from a PC or
smartphone.
- Integrated class 2 laser pointer
- Rubber feet on bottom and back (for forward-facing and upward-facing use)
- Powered from 12V through
an external AC adapter
(included) or an optional car
power cable (not included)
- USB data cable for firmware
updates and remote control.
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