Hypertension and Exposure to Noise Near Airports: the HYENA Study

We compare two approaches for high-level power estimation of DSP components implemented in FPGAs for different sets of data streams from real-world applications. The first model is a power macro-model based on the Hamming distance of input signals. The second model is an analytical high-level power model based on switching activity computation and knowledge about the component’s internal structure, which has been improved to also consider additional information on the signal distribution of two consecutive input vectors. The results show that the accuracy of both models is, in most cases, within 10% of the low-level power estimates given by the tool XPower when cycle-bycycle input signal distributions are taken into account, and that the difference between the model accuracies depends significantly on the nature of the signals. Additionally, the effort required for the characterization and construction of the models for different component structures is discussed in detail

Can exposure to noise affect the 24 h blood pressure profile? Results from the HYENA study

International audienceObjective: To study the association between exposure to transportation noise and blood pressure (BP) reduction during night-time sleep. Methods: 24-hour ambulatory BP measurements at 15-minutes intervals were carried out on 149 persons living near 4 major European airports. Noise indicators included total and source-specific equivalent indoor noise, total number of noise events, annoyance scores for aircraft and road-traffic night-time noise. Long-term noise exposure was also determined. Multivariate linear regression analysis was applied. Results: The pooled estimates show that the only noise indicator associated consistently with a decrease in BP dipping is road traffic noise. The effect shows that a 5dB increase in measured road traffic noise during the study night is associated with 0.8% (-1.55,-0.05) less dipping in diastolic BP. Noise from aircrafts was not associated with a decrease in dipping, except for a non-significant decrease noted in Athens where the aircraft noise was higher. Noise from indoor sources did not affect BP dipping. Conclusions: Road traffic noise exposure maybe associated with a decrease in dipping. Noise from aircrafts was not found to affect dipping in a consistent way across centers and indoor noise was not associated with dipping