Share on Facebook. Opens in a new tab or window Share on Bluesky. Opens in a new tab or window Share on X. Opens in a new tab or window Share on LinkedIn. Opens in a new tab or window Palpitations due ...

The pitch of a blaring car horn rises as the vehicle approaches and falls as it moves away. That’s the Doppler effect, and it also occurs for electromagnetic radiation, enabling police to catch ...

When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. Ever since I built a receiver more than 40 years ago to pick up RF frequencies around 15 kHz (it ...

Oscilloscopes are time-domain instruments, but because they digitize waveforms, oscilloscopes can process time-domain signals into the frequency domain. The FFT (Fast Fourier Transform), spectrum ...

Is there a faster way to determine a frequency? It turns out there is. An accurate analog clock tick-tick-ticks with a constant precision and well known frequency: one tick per second. The longer you ...

Written by Bernard D. Beitman M.D. and Ruslana Remennikova, MS. Since the beginning of human civilization, history has shown a correlation between sound and cognitive, mental, and physical wellness. 1 ...

Researchers have developed the first application to combat 'shoulder-surfing' of PINS and passwords: a hybrid-image keyboard that appears one way to the close-up user and differently at a distance.

This paper presents the results from a field experiment that examines the effects of nonfinancial performance feedback on the behavior of professionals working for an insurance repair company. We vary ...

Palpitations due to premature beats, either ventricular contractions (PVCs) or atrial contractions (PACs), can be extremely vexing even when we know they are benign. For many individuals, these ...