dog whistle
silent whistle
Galton's whistle

Dogs are able to hear ultrasound, which is the principle of 'silent' dog whistles.

Some dog whistles have adjustable sliders for active control of the frequency produced.

Brian Wilson: lead vocals, dog whistles, sound effects incl.

How do dog whistles work?

They really don't need to say anything.The republican primary now consists entirely of dog whistles and god whistles.

"Possibly a circus could make whistles for elephants which would be just the opposite of the dog whistles.

So-called "Nelson" dog whistles generate sounds at frequencies higher than those audible to humans but well within the range of a dog's hearing.

"Sure," Mr. Kieselstein-Cord said, "there are wonderful plastic dog whistles."

Unobtrusive dog whistles are used as bridges, and positive reinforcers are either primary (food) or tactile (rub downs), and not vocal.

It is an analogy to dog whistles, which are built in such a way that their high-frequency whistle is heard by dogs, but is inaudible to humans.

Bridges to positive reinforcement include vocal cues, whistling, and dog whistles, as well as clickers used in clicker training, a method popularized by Karen Pryor.

Special high frequency dog whistles are available for this purpose, which although virtually inaudible to the human ear, can be heard by dogs with their more sensitive hearing a good distance away.

His targets tend to be more oblique but his Daily Mail/Tory/BNP fan club certainly can hear his none-too-subtle dog whistles.

Haney-López is currently writing Dog Whistle Politics: How Fifty Years of Race-Baiting Wrecked the Middle Class, expected to be published in 2013.

The frequency of most dog whistles is within the range of 23 to 54 kHz, so they are above the range of human hearing, although some are adjustable down into the human range.

Superhuman Hearing - Can hear far more sounds with far more detail and at far greater distances than normally humanly possible, including sounds on frequencies undetectable by humans such as dog whistles.

When we are in the market for anything of substance - an apartment, a job, a relationship, a dress to wear on New Year's Eve - we give off a high-pitched tone akin to that emitted by dog whistles.

The first chapter deals with how progressives in Australia have come to interpret all appeals to nationalism and Australianness as merely being 'dog whistles' to racist Australians who pick up the prejudiced undertones of such messages.

Early in 2004, Peter Manning, a former reporter who teaches journalism at the University of Technology in Sydney, wrote a short book examining derogatory characterizations of Muslims titled "Dog Whistle Politics and Journalism."

In it, he wove elaborate layers of vocal harmonies, coupled with sound effects and unconventional instruments such as bicycle bells, buzzing organs, harpsichords, flutes, the Electro-Theremin, and dog whistles, along with the more usual keyboards and guitars.

According to CraveOnline, Rikimaru and Ayane are "like Batman with all their decoys, dog whistles, disguises, grappling hooks and other toys, an essential part of the ninja experience that had been missing from video games for far too long."

A golden lapel pin in the shape of a pickle is a recent example, and Heinz has also made a pickle whistle, presumably as a fun item for kids too young to wear a pin (similar to the Oscar Meyer hot dog whistles distributed from the Wienermobile).

Unfortunately for protagonist Caractacus Potts, the "Toot Sweets" act like dog whistles, calling all the local canines into the candy factory (not unlike the Pied Piper of Hamelin), ruining the sanitary conditions of the factory and turning love interest Truly's father against him.

Fish pursed his lips for a moment and blew short silent whistles through them.

The station inn was renamed as The Silent Whistle on the closure of the line.

Eku was originally a wild Ohju, but was injured from a Silent Whistle.

Friday night's Silent Whistle isn't the first example of "Ranger Rules" helping the home team win games at Madison Square Garden this spring.

She is strongly against using the Toudas and Ohjus for war and even refuses to give Lilan special water (Tokuji sui), which strengthens her, and use the Silent Whistle on her, which paralyzes an Ohju.