Development team reaches milestone: New all-rounder for acoustic measuring devices
SPEKTRA reached an important milestone with the SQ‑6 pressure chamber calibrator. The targeted performance parameters of the prototype have been successfully confirmed and set new standards in acoustic measurement technology.
The SPEKTRA development team has intensively tested and optimised the pressure chamber calibrator to meet the high demands of the industry. The values achieved confirm the performance of the system and underline SPEKTRA's commitment to quality and innovation in measurement technology.
With this success, SPEKTRA consolidates its position as a leading provider of calibration solutions and sets new standards in acoustic measurement technology. Customers benefit from increased accuracy and reliability in the calibration of their measuring instruments, leading to improved measurement results and greater efficiency.
How does an acoustic coupler work?
An acoustic coupler is a test device that can be used to test and calibrate acoustic measuring equipment such as measuring microphones, sound level meters, artificial ears or dosimeters.
It is based on the principle of a pressure chamber, in which the device under test and a reference standard are placed opposite each other in a very small chamber at a short distance from each other. A pressure sound field that is as uniform as possible is generated in this chamber. Since the transmission behavior of the reference standard is known, the sound pressure in the chamber can be deduced from its output voltage and the test specimen can be compared with it at the same time.
What were the key targets for the development?
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High sound pressure level over wide frequency range:
114 dB - 16 Hz ... 20 kHz
145 dB - 16 Hz ... 5 kHz -
Low distortion:
Maintaining signal integrity for precise results -
Compact design:
Efficient handling without compromising on performance
Which measurands can be calibrated?
Our coupler is suitable for various measuring devices, e.g. for ½” microphones, sound level meters or intensity probes.
This results in a wide range of possible applications, which also cover the majority of calibration tasks in the SPEKTRA acoustics laboratory. From the calibration of pressure sensitivity to phase calibration and the characterization of microphones, including the measurement of complex transfer functions and distortions, the newly designed coupler is suitable for various scenarios.
Impressive highlights
- integrated clamping jig facilitating direct fixation and sealing for enhanced stability and accuracy
- variable sealing ring position - adaptable for different protection grills and pressure-balancing capillaries
- fully symmetric electroacoustic topology ensuring a more uniform sound field for reliable results
- electrical insulation, safeguarding the device under test (DUT) and reference device from potential interferences
- compact design of 45 mm × 60 mm
Conclusion
Built in accordance with the international norm IEC 61094-5:2001, our new acoustic coupler SQ-6 not only adheres to established standards for pressure calibration of microphones but also paves the way for new challenges - guaranteeing compatibility and reliability.
In conclusion, our new coupler represents a leap forward in acoustic measurement technology. With its significantly improved performance, extended use cases and reliability, it empowers professionals across industries to achieve precise and accurate results.
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We are your partner for measurement tasks in acoustics and audiometry.
Phone: +49 351 400 24 0 | Email: sales@spektra-dresden.com
