Researchers have built a passive acoustic Helmholtz resonator that captures the heart's faint sounds and a machine learning algorithm that turns them back into an electrocardiogram waveform.

Exhaust systems have changed dramatically over the years, from the simple single-muffler systems from cars of the '50s and '60s, to the active exhaust systems from select late model cars like the 2025 ...

EPFL researchers have engineered a silicon nitride photonic integrated laser that remains locked in an ultralow-noise, sub-10 ...

Our story starts with the classic antihero—the old-school hot-rodder who wished to improve his power by reducing exhaust backpressure while reducing weight. Daddy-o scored the trifecta by annoying the ...

An exhaust resonator is a hollow chamber in the exhaust system that cancels specific unwanted sound frequencies, typically ...

It has been almost 100 years since the resonator guitar was born of necessity. In the days before amplification, musicians needed a way to make their acoustic guitars louder, and the striking ...

Resonators are an important tool in physics. The curved mirrors inside the resonators usually focus light waves that act, for instance, on atoms. Physicists at ETH Zurich have now managed to build a ...

The result extends an experimental history stretching back more than a century. Quantum jumps were theorized in the early ...