Active sonar Active sonar uses a sound transmitter and a receiver.

In acoustics, reflection causes echoes and is used in sonar.

During World War II, Casa Loma was used to conceal research on sonar, and for construction of sonar devices (known as ASDIC) for U boat detection.

Amar Sonar Bangla (, My Golden Bengal ) is the national anthem of Bangladesh.

Seek Strike Sonar, anti submarine warfare and the Royal Navy 1914 54.

Echoes may be desirable (as in sonar) or undesirable (as in telephone systems).

He can see in near total darkness and has enhanced hearing granting limited sonar.

Today, commercial fishing vessels rely almost completely on acoustic sonar and sounders to detect fish.

The engines were found below the Atlantic Ocean's surface through the use of advanced sonar scanning.

The acoustic frequencies used in sonar systems vary from very low (infrasonic) to extremely high (ultrasonic).

Intermittent sound sources (such as a wrench being dropped) may also be detectable to passive sonar.

These robots originally used manually created CAD floor plans, sonar sensing and wall following variations to navigate buildings.

Fishermen also use active sonar and echo sounder technology to determine water depth, bottom contour, and bottom composition.

We make maps of these mountain ranges with sound, with sonar, and this is one of those mountain ranges.

The author named it after the sound that sonar makes, since its methodology is similar to sonar's echo location.

Identifying sound sources Passive sonar has a wide variety of techniques for identifying the source of a detected sound.

Active sonar creates a pulse of sound, often called a ping , and then listens for reflections (echo) of the pulse.

Lynx Mk.95 Version of Super Lynx for the Portuguese Navy, with Bendix radar in undernose radome, dipping sonar but no FLIR.

For example, in oceanography, a lexicon of dolphin language is actually being created by basically visualizing the sonar beams that the dolphins emit.

ISBN 0 11 290423 8 Hackmann, Willem D. Sonar Research and Naval Warfare 1914 1954 A Case Study of a Twentieth Century Science .

The advanced radar from previous games has been removed in favor of a simple motion detector and sonar system more suitable for the game's time period.

These vessels were significantly larger than wartime ships and had fully automatic main guns, unit Machinery, radar, sonar, and antisubmarine weapons such as the Squid mortar.

A few hypotheses are being discussed by experts, ranging from fungal or viral infections to the use of low frequency sonar by the military or off shore oil foraging companies.

Through his company Nauticos he extensively searched a quadrant north and west of Howland Island during two deep sea sonar expeditions (2002 and 2006, total cost 4.5 million) and found nothing.

In the open ocean, the thermocline is characterized by a negative sound speed gradient, making the thermocline important in submarine warfare because it can reflect active sonar and other acoustic signals.

The British focused development on anti submarine weaponry and tactics, such as sonar and convoys, while Germany focused on improving its offensive capability, with designs such as the Type VII submarine and wolfpack tactics.

To a large extent, the modern discipline of electronic engineering was born out of telephone, radio, and television equipment development and the large amount of electronic systems development during World War II of radar, sonar, communication systems, and advanced munitions and weapon systems.