Abstract: A sensor having a MEMS microphone (1) and a processor (2). The MEMS microphone (1) having a noise spectrum depending on a fluid to be analyzed. The processor (2) is configured to receive a measurement signal from the MEMS microphone; to identify a characteristic of the noise spectrum of the MEMS microphone in the measurement signal; and to determine a property of the fluid based on the characteristic identified.

Abstract: Method and probe device for quality measuring in IP streaming of audio, video, or a synchronized mix of both, performing: receiving a streaming media flow at a user's end, measuring at least one network parameter which indicates QoS and/or QoE, extracting frames from the streaming at the user's end, analyzing the frames at the user's end by searching for determined errors and delivering at least a quality parameter defined by certain results of said searching; correlating each measured network parameter and each delivered quality parameter at the user's end and returning the results to the IP network operator though a control and configuration interface. The operator uses the control and configuration interface to configure at the user's end how to perform the correlation between the parameters, taking into account in said correlation the user's preferences described by an ontology.