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  2. Joseph Hudson (inventor) - Wikipedia

    en.wikipedia.org/wiki/Joseph_Hudson_(inventor)

    His whistle is still used by the force and many others worldwide. He later invented the first referee whistle for football matches, prior to this handkerchiefs were used at games. Hudson also invented the 'Acme Thunderer', the first ever pea whistle , which has been, and remains, the most used whistle in the world, from train guards to dog ...

  3. Whistle - Wikipedia

    en.wikipedia.org/wiki/Whistle

    A party whistle A metal pea whistle. A whistle is a musical instrument which produces sound from a stream of gas, most commonly air. It may be mouth-operated, or powered by air pressure, steam, or other means. Whistles vary in size from a small slide whistle or nose flute type to a large multi-piped church organ.

  4. Physics of whistles - Wikipedia

    en.wikipedia.org/wiki/Physics_of_whistles

    A trailing edge tone occurs when an exterior flow passes over a trailing edge. There is a whistle that is a combination of an edge tone and a trailing-edge tone and might be called a wake-edge tone. It occurs in rotating circular saws under idling conditions and may be called the circular-saw whistle. Under load conditions, blade vibration ...

  5. Puppy Bowl turns 20: Meet the pups and the 'rufferee' making ...

    www.aol.com/puppy-bowl-turns-20-meet-002140533.html

    Schachner himself found the right dog this year: his new assistant ref, Whistle. After fostering over 40 dogs in the past 10 years, he fell in love with the pup on the job and gave her a furever home.

  6. J Hudson & Co - Wikipedia

    en.wikipedia.org/wiki/J_Hudson_&_Co

    Their Tornado 2000 whistle is capable of easily reaching 122 decibels. J Hudson & Co was founded in the 1870s in Birmingham by Joseph Hudson (1848–1930) and his brother James Hudson (1850–1889). The company became a manufacturer of whistles and continues as Acme Whistles. Acme is the world's largest and most famous producer of whistles.

  7. Puppy Bowl assistant referee will miss calls. Give her a ...

    www.aol.com/puppy-bowl-assistant-referee-miss...

    The 20th-anniversary Puppy Bowl will be held on Super Bowl Sunday (Feb. 11). The puppiest show ever features Whistle, the first dog assistant referee.