For years, testing audio equipment with acoustic measurements was part of approval testing for mobile phones. Over the past years, the field of application of these tests has expanded. Audio tests are now also required for the approval of voice or emergency call assistance systems.
We are accredited to test audio equipment devices and the respective voice quality. Within the scope of our services, we specialize, among other things, in testing the acoustic quality assessment of mobile devices. Depending on the requirements, the acoustic tests are performed with test head couplers or the so-called “HATS” (head and torso simulators) as well as professional microphones and audio sources. In addition, we test the operability and quality of the voice functions of the head units and emergency call assistance systems in the vehicle for the automotive industry – with the aid of specially designed measuring systems.
When speech systems and technology are used in a wide variety of devices, speech quality in particular is a necessary feature for high-quality products. A large number of institutions, committees and associations therefore define standards and specifications for the quality of voice transmission to telecommunications products connected to the mobile network.
In our audio laboratories, we test a wide variety of products for their audio quality and thus support manufacturers in obtaining approval of the devices by various institutions:
For some years now, the use of emergency assistance systems in vehicles of various classes has been mandatory in many countries and regions of the world (e.g. eCall, ERA-GLONASS).
For the automotive industry we test the operability and quality of the voice functions of head units and emergency assistance systems in vehicles. These tests are usually the basis for the market approval of the emergency call systems.
When using Alexa, Amazon’s cloud-based voice service, customers expect a high quality and consistent experience on all Alexa built-in devices. To support this experience, Amazon has implemented a mandatory testing process for device manufacturers who wish to market products with the Alexa Built-in Badge.
We support manufacturers of products with the Amazon Alexa feature by providing the official self-test services.
We conduct acoustic testing services in our laboratories in Essen and Milpitas (Silicon Valley). Thanks to technically excellent equipment we can test a wide range of devices.
Our laboratories in Duesseldorf and Essen are accredited by the DAkkS in accordance with DIN ISO 17025 to perform a wide range of audio tests.
Detailed information on the scope of accreditation for our audio laboratories in Germany can be found on our accreditation overview.
Our laboratory in the USA holds the DIN EN ISO 17025 accreditation of the A2LA for audio services and can therefore also offer accredited test services in the field of audio.
Detailed information on the scope of accreditation for our audio laboratories in Germany can be found on our accreditation overview.
The following three methods are used in audio tests: the enveloping surface method, the reverberation chamber method and the comparative sound source method.
Are you interested in more details on this topic or are you looking for answers to urgent questions? Please contact us. Benefit from our expert support for all challenges regarding the market approval of your products.