SPEKTRA designs, develops, produces and provides calibration services for vibro-impact acoustic metrology systems - Electroacoustic Couplers

SPEKTRA (SPEKTRA Schwingungstechnik und Akustik GmbH), founded in 1994 and headquartered in Dresden, Germany, is a high-tech company that designs, develops, produces and provides calibration services for vibro-acoustic measurement and calibration systems. The products are designed and manufactured for the purpose of metrology and calibration, and extend to the fields of structural testing and quality control. Products include vibration, shock, acoustic, dynamic pressure, dynamic force calibration and test systems. As a leading manufacturer of vibration and acoustic measurement instruments, the company is unique in the world in having the world's highest standard of absolute method vibration calibration qualification laboratories and in being able to provide calibration services.

Electroacoustic Couplers
Product Features
True pressure chamber calibration with acoustic couplers
Calibration of measurement microphones (1-inch condenser and electronic microphones)
Provides sound pressure level for calibration of sound level meters and measurement chains
Includes microphone stand fixtures
Includes high-end power amplifier
On request: there is a solution for 1/2 inch microphones: SQ-4
Secondary calibration of the pressure chamber of the microphone according to IEC 61094-5
Pressure chamber secondary calibration of sound level meter and sound level measurement chain according to IEC 61672
Low distortion, even at low frequencies
Symmetrical and very small pressure chamber

Technical data
Frequency range: 31.5 Hz - 8 kHz
Maximum electrical power of the sound source: 0.5W
Distortion factor at 94dB (31,5Hz-1kHz): <3% (THD)
Stability at 94dB: <0.2dB
Microphone diameter 1 inch

System components
SQ-4.1 active electro-acoustic coupler
High-end power amplifier S.M.S.L sAp-8 including power plug and plug adapter
Microphone stand fixture
System cables

Applications
Accredited calibration laboratories
Measuring instrument validation departments in research and industry, e.g. test laboratories in the automotive sector or in the aviation and aerospace industry
Quality assurance in manufacturingQuality assurance in the manufacture of microphones, sound level meters and dosimeters