BEDROCK   SMBTBKT

SMBTBKT
$4,832.40      

Measuring the Speech Transmission Index has never been easier - or more affordable. The Bedrock SM50 is a full-featured acoustic measuring instrument, designed from the ground up by the development team at Embedded Acoustics - the team that invented STIPA. You will easily navigate through its functions thanks to the full-colour touch screen, and retrieve your stored measurement data through USB. The device is fully compliant to all the newest standards, and has several unique features to ensure that you get the most accurate and reliable results of any STI measuring device.

Doing an STI measurement will literally be as simple as pressing a button. If you will be doing Speech Transmission Index measurements only infrequently, perhaps once in a while, you will appreciate the instrument's ease-of-use and intuitive user interface - no need to memorize complex menu structures. But even the most demanding STI user will still find every option he or she ever needed on the device. The "STIPA pro" mode gives instant access to all measurement details, including the MTF values. A unique feature of the Bedrock SM50 (and SM90) is the availability of a Full STI measurement.

The SM50 has more to offer than just STI measurements. Such as the integrated Sound Pressure Level meter with all the usual settings (including A, C and Z-weighting, fast-slow and Leq) a Real-Time Analyzer (RTA) and reverberation time measurements (RT60). Different measurement modes are accessed through an easy-to-use menu.

The SM50 STIPA meter is built from top-notch digital and analog components. Its multi-range pre-amplifier offers an impressive combined measuring range of more than 110 dB. The SM50 comes standard with a Type 2/Class 2 measuring microphone, but will work with any measuring microphone that operates on 48V phantom power. Working with line-level input signals from an external source is also easy.

• STIPA and Full STI
• Speech Level Meter (cf. 602168-16)
• SPL meter
• Real-Time Analyzer (RTA) with 1/1, 1/3, 1/6 and 1/12 octave resolution
• Reverberation time (RT60)
• Statistical acoustics
• LEQ logging
• RTA logging / spectrograms
• Environment/safety logging and monitoring
• Noise Curves (NR/NC)
• Building acoustics, airborne and impact noise: SRI/STC, Dn’T/R’, L’nT, L’nw/L’nTw
• FFT analysis
• Oscilloscope
• AC Volt meter
• Loudspeaker polarity
• Calibrated audio recording

More functionality to be added through free firmware updates

• Full-color 3.2” LCD touch screen
• 8 GB of internal storage, at least 6.8 GB available for storing measurement data
• Downloading of measurement data and firmware updating through USB
• Easy calibration procedure
• Comes standard with Type 2 / Class 2 measuring microphone; works with any 48 V XLR measuring microphone.
• Approx. 4-6 hours of use on a single charge, depending on intensity of use.
• Recharging through USB wall charger (charger with international adapters included)

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.

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.

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.