You may click on any underlined ratio to hear a sound example. In each case, the fundamental frequency is 100 Hz, both carrier and modulator are sine waves, and the modulation index is swept from 0 to ...

[brmarcum] takes us back to analog building block basics with his Frequency Modulation and Demodulation tutorial. Frequency Modulation (FM) sounds simple at first, but understanding the ...

Especially in the frequency bands below 1 GHz, you might find yourself interfacing with a module at really low level, where you might be tuning modulation parameters. The following overview should ...

Using high-frequency sound waves to make tunable optical filters, modulators and Q-switches is a well-established and convenient technological solution for many applications, reports Neil Savage.

The frequency of ultrasound is therefore greater than 20,000 hertz. Ultrasound, like audible sounds, is transmitted by means of longitudinal waves. Ultrasound is used in medicine to break up ...

The equation needed when studying waves is: wave speed = frequency x wavelength. A ripple tank allows you to study transverse waves in water. Ripple tanks vary a lot in how they look, but usually ...

A new patterned spintronic emitter enables room-temperature control of terahertz wave polarization.

These waves are higher frequency than surface waves. P waves are also known as compressional waves, because they push and pull. Particles subjected to a P wave move in the same direction that the wave ...

Amplitude modulation (AM) is the oldest method of transmitting human voice electronically. In an analog telephone conversation, the voice waves on ... with a fixed center frequency (the station's ...

Researchers from Beihang University in China have created a spintronic THz emitter with a microscale stripe pattern that ...