enow.com Web Search

Search results

1. Results from the WOW.Com Content Network

2. Dog whistle - Wikipedia

   en.wikipedia.org/wiki/Dog_whistle

   Some dog whistles have adjustable sliders for active control of the frequency produced. Trainers may use the whistle simply to get a dog's attention or to inflict pain for the purpose of behaviour modification. In addition to lung-powered whistles, there are also electronic dog whistle devices that emit ultrasonic sound via piezoelectric ...

3. Ultrasonic transducer - Wikipedia

   en.wikipedia.org/wiki/Ultrasonic_transducer

   A curvilinear array ultrasonic transducer for use in medical ultrasonography Inside construction of a Philips C5-2 128 element curved array ultrasound sensor. Ultrasonic transducers and ultrasonic sensors are devices that generate or sense ultrasound energy. They can be divided into three broad categories: transmitters, receivers and transceivers.

4. Ultrasound - Wikipedia

   en.wikipedia.org/wiki/Ultrasound

   Ultrasound is sound with frequencies greater than 20 kilohertz. [1] This frequency is the approximate upper audible limit of human hearing in healthy young adults. The physical principles of acoustic waves apply to any frequency range, including ultrasound. Ultrasonic devices operate with frequencies from 20 kHz up to several gigahertz.

5. Phased array ultrasonics - Wikipedia

   en.wikipedia.org/wiki/Phased_array_ultrasonics

   Animation showing the principle of an ultrasonic scanner used in medical ultrasonic imaging. It consists of a beamforming oscillator (TX) that produces an electronic signal consisting of pulses of sine waves oscillating at an ultrasonic frequency, which is applied to an array of ultrasonic transducers (T) in contact with the skin surface that convert the electric signal into ultrasonic waves ...

6. AOL.com - News, Sports, Weather, Entertainment, Local & Lifestyle

   www.aol.com

   AOL latest headlines, entertainment, sports, articles for business, health and world news.

7. 28 Most Expensive Dog Breeds - AOL

   www.aol.com/finance/28-most-expensive-dog-breeds...

   The real cost of getting a dog is more than just the purchase price -- long-term expenses need to be considered, as well. If you do a little research, you'll find that although there are dozens of ...