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Crystal radio


A crystal radio receiver, also called a crystal set or cat's whisker receiver, is a very simple radio ... Thus, crystal sets produce rather weak sound and must be listened to with sensitive earp...

Why do foxes' ears point forward?


As foxes move forward to approach an animal, their ears naturally point in the direction they walk, so they can hear the softest of sounds coming from their next  ...

Why Do the Ears of a Fox Point Forward? | eHow UK


Most members of the canine and feline families have ears that point forward. ... Unlike most mammals, they can detect the low-frequency sounds of small ... Grazing animals, including rabbits, are vulnerable to predators, like the fox, that sneak ...

Directional preference may enhance hunting accuracy in foraging ...


Jan 6, 2011 ... Prior to an attack, foxes move forward very slowly and deliberately, with ... Each triangle in (a) represents four observations (i.e. separate data points) ((b) three observations; ... Within the home range of a non-migratory species like the red fox , ... sound intensity and time differences between its two ears [12].

Protect Ear USA | Exclusive Licensed Producers of dB Blockers


Emergency / First Aid Responders / Firefighters – 110 – 140 dB of noise is ... How does Custom Protect Ear (CPE) utilize this 3D Technology to help your ears? ... Other 3D printers will spool out or deposit material much like an automated ..... The wearer can still hear alarm clocks, fire alarms, smoke detectors and buzzers.

"Gasland" Director Josh Fox's New Documentary Explores The ...


Fox's movie Gasland may have helped win the battle to protect the woods near ... Floods, droughts, migration, and disease are presented almost like an urgent spoken .... Detectors just don't do well with holes, and if those holes are small— the ... enabled individual mobility—moving each traveler from point A to point B as ...

e - arXiv.org


It is well known that spherical resonant-mass detectors can determine the direction of .... To calculate the output response we follow closely the method used by Forward where a tensor format ... like an ear on the ground than a telescope pointed towards the sky. ..... C. Fox-Smith interferometer with phase noise cancellation.

Up next, recap & links - CBS News


But before he does, he sits down with Jane Pauley at his home in St. Paul to talk about .... HEADLINES: No metal detectors at Christina Grimmie concert (Video) ... A hip-hop musical about Alexander Hamilton may sound like a tough sell at the box ..... We leave you this Sunday morning at the Sachuest Point National Wildlife  ...

The Wal-Mart You Don't Know | Fast Company | Business + Innovation


"Clearly," says Edward Fox, head of Southern Methodist University's J.C. ... Doesn't sound like much, until you do the math: That's 240,000 gallons of .... It's a tale he tells to illustrate an admiring point he makes about the retailer. .... its in- store TV network and with banners slipped over the security-ta...

Tips for Finding Coins in your own Neighborhood | MetalDetector.com


Learn how to use a metal detector to locate treasure finds and coins in your neighborhood. ... homes in your neighborhood, make a point to take your metal detector there. ... A hand-held pinpointer like the Garrett Pro-Pointer is very sensitive and will quicken ... Learn to recognize your detector's sounds when it finds a coin.

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Why do the ears of a fox point forward as sound detectors


Foxes move their ears forward when they can hear a faint sound they try and hear the ... Why do the ears of a fox point forward as sound detectors? .... unlike with dogs that end as suddenly as it started, resulting in what sounds like a "Bark!

Foxes use the Earth's magnetic field as a targeting system ...


Jan 11, 2011 ... As the fox creeps forward, it listens for the sound of a mouse. ... last month which explores how birds – the best-studied magnetic detectorsdo it. ... of birds – it's not entirely clear what the point of having a magnetic sense is. ... Other senses are linked to openings in the body like eyes, ears and mouths, b...

More on Bat Detectors... - Bat Conservation and Management


However, the characteristics that make them sound different to our ears are ... And SonoBat makes it easy to do this with an intuitive point and click .... Tick-like sounds at 40 kHz suggest a Myotis, a common genus that includes one ..... Bats that prey on airborne insects in open areas face a relatively straight-forward problem.