Loudspeaker Test Chambers
Loudspeaker measurement has traditionally been difficult due to the requirement for a very large space to avoid room-related artefacts and the problem of very precise location of the device under test and measurement microphones. Variations of 6dB or more in responses measured at different times are not uncommon as a result.
In the age of digital precision and ever improving sound quality, better measurement and characterization of loudspeakers is a must.
The range of Loudspeaker Test Chambers designed by Hill Acoustics neatly and inexpensively solves these problems with a calibrated enclosure so that the equivalent free-field response can easily be calculated and by providing a precise jig for the speaker and microphone.
TTC and other Loudspeaker Test Chambers
Spectral Measurement and Hill Acoustics are proud to introduce a new line of compact Loudspeaker Test Chambers (LTCs) for consistently stable, convenient and affordable loudspeaker measurements. A range of Tetrahedral Test Chambers compliant with the new international standard IEC60268-21 is available in various sizes, as well as non-tetrahedral custom designs that enable, for example, easy 360-degree polar response measurement.No Anechoic Chamber required for Free Field results
Using a TTC it is no longer necessary to work in an anechoic chamber and furthermore the TTC allows measurements below the lower limit of most practical anechoic chambers. The TTC brings precise and repeatable free-field loudspeaker measurement over the full audible frequency range within reach of every audio development engineer.Repeatable Measurements to IEC60268-21 sec 13.1(d)
The Tetrahedral Test Chamber ensures a precisely defined, stable and modally minimised environment, completely free from the set-up variations that clouded results from former less precise measurement setups.Precise free-field response
The Tetrahedral Test Chamber's low frequency response is calibrated and a frequency response correction curve is supplied with each chamber which can then be appled to results measured by the internal microphone.High frequency internal reflections are sufficiently absorbed by internal damping materials so that the measured HF response can be combined with the compensated LF response to provide an equivalent, accurate free field response.
Every Chamber Certified & Calibrated
The Tetrahedral Test Chamber is supplied with a certificate of calibration. If supplied in flat-pack form for shipping convenience (typically for the larger chambers) the calibration method is published and can be performed locally.The most compact and economical solution for free field measurement
Tetrahedral test chambers provide free field response with best repeatability over the widest bandwidth while also offering a compact and economical solution.TTCs are available in the following sizes:
| Model (Also base side length in mm) | Suitable for speaker sizes |
| 350 | up to 100mm / 4 inches |
| 750 | up to 200mm / 8 inches |
| 900 | up to 300mm / 12 inches |
| 1500 | up to 460mm / 19 inches |
Contact us now for pricing and availability or for advice on which size to choose, OR to discuss your bespoke requirements!
The Hill Acoustics Tetrahedral Test Chamber
Hill Acoustics TTC manufactured in the UK by Spectral Measurement under license from Hill Acoustics.
These specifications are provisional and may be changed without notice.
© Prism Media Products Ltd 2013-2019
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