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A hydrophone (Ancient Greek: ὕδωρ + φωνή, lit. 'water + sound') is a microphone designed for underwater use, for recording or listening to underwater sound. Most hydrophones contains a piezoelectric transducer that generates an electric potential when subjected to a pressure change, such as a sound wave.
They are sometimes preferred over Bluetooth or other radio technologies due to their simplicity and absence of batteries. The principle of the speaking tube can be found on certain playground equipment, which employs tubing connecting sound horns or other speaking boxes to allow voices to travel to separate points, for the amusement of the ...
In the context of telecommunication, a headset is a combination of a headphone and microphone. Headphones connect to a signal source such as an audio amplifier, radio, CD player, portable media player, mobile phone, video game console, or electronic musical instrument, either directly using a cord, or using wireless technology such as Bluetooth ...
AirPods Pro 2, the best wireless headphones out there, are down to $154, the lowest price we've ever seen. The 10th generation iPad is down to $250 , while the 9th generation iPad has already sold ...
A portable set (often essentially a waterproof, VHF walkie-talkie in design) can be carried on a kayak, or to a lifeboat in an emergency, has its own power source and is waterproof if GMDSS-approved. A few portable VHFs are even approved to be used as emergency radios in environments requiring intrinsically safe equipment (e.g. gas tankers, oil ...
BEIJING (Reuters) -China said on Sunday it was taking countermeasures against two Canadian institutions and 20 people involved in human rights issues concerning the Uyghurs and Tibet.
A U.S. appeals court has rejected British socialite Ghislaine Maxwell's request to revisit its decision upholding her conviction for helping the late financier Jeffrey Epstein sexually abuse ...
AirPods are wireless Bluetooth earbuds designed by Apple. They were first announced on September 7, 2016, alongside the iPhone 7. Within two years, they became Apple's most popular accessory. [4] [5] AirPods are Apple's entry-level wireless headphones, sold alongside the AirPods Pro and AirPods Max.
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