Directivity of Microphones in Portable Devices
Portable devices such as smartphones, tablets or laptops are often used in hands-free mode for telephone calls. For the manufacturer of the device, it is important to ensure that the microphone is able to pick up the speech from all directions so that the user is well understood. With the new version of the microphone test software RT-MicFX, NTi Audio offers a simple and convenient method to determine this microphone directivity.
Portable devices are used extensively in our daily verbal communication, and more and more communications applications are being launched. Often, such portable devices are utilized in a hands-free mode; the device stays in one place, and the user moves freely in space. This presents a challenge - the intelligibility of the speech should remain clear and consistent, regardless of the talker’s position. Some devices employ more than one microphone to increase the number of positions from which speech can be detected and thereby improve the quality of the spoken message.
From the perspective of the testing engineer, measuring a microphone in such an environment may seem formidable because the signal received by the microphone generally cannot be forwarded in real time to an audio measurement system. With the NTi Audio microphone test system this task is made very easy.
read more ...
|