Search results
Results from the WOW.Com Content Network
The circuit usually includes a delay between the sound stopping and switching direction, to avoid the circuit turning off during short pauses in speech. A special case exists, if there is enough energy to power the system directly. For example, a microphone may send a voltage high enough to directly operate a transmitter. [2]
A sound-powered telephone is a communication device that allows users to talk to each other with the use of a handset, similar to a conventional telephone, but without the use of external power. This technology has been used since at least 1944 [ 1 ] for both routine and emergency communication on ships to allow communication between key ...
Audio network technology matrix [1] Technology Development date Transport Transmission scheme Mixed use networking Control communications Topology Fault tolerance Distance Diameter Network capacity Latency Maximum available sampling rate AES47: 2002 [2] ATM: Isochronous Coexists with ATM Any IP or ATM protocol, IEC 62379: Mesh Provided by ATM
In some of these cases, sound from the loudspeaker enters the microphone almost unaltered. The difficulties in canceling echo stem from the alteration of the original sound by the ambient space. These changes can include certain frequencies being absorbed by soft furnishings and reflection of different frequencies at varying strength.
For example, in voiceband speech coding, only information in the frequency band 400 to 3500 Hz is transmitted but the reconstructed signal retains adequate intelligibility. Speech coding differs from other forms of audio coding in that speech is a simpler signal than other audio signals, and statistical information is available about the ...
The classical example of a source separation problem is the cocktail party problem, where a number of people are talking simultaneously in a room (for example, at a cocktail party), and a listener is trying to follow one of the discussions. The human brain can handle this sort of auditory source separation problem, but it is a difficult problem ...
One example is a speaking tube used aboard ships for communication between decks. Other examples include the rear passage in a transmission-line loudspeaker enclosure, the ear canal, and a stethoscope. The term also applies to guided waves in solids.
E and M signaling is a type of supervisory line signaling that uses DC signals on separate leads, called the "E" lead and "M" lead, traditionally used in the telecommunications industry between telephone switches.