![Is it a high-frequency whistle?
Is it a high-frequency whistle?](data:image/png;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs=)
Is it a high-frequency WHISTLE?
The Big Bang Theory Season 2, Episode 10
![Yes, who do you think gave him
the danger whistle?
Yes, who do you think gave him
the danger whistle?](data:image/png;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs=)
Yes, who do you think gave him
the danger WHISTLE?
The Big Bang Theory Season 8, Episode 19
![Can I blow the whistle?
Can I blow the whistle?](data:image/png;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs=)
Can I blow the WHISTLE?
The Big Bang Theory Season 7, Episode 10
![When you hear
a songbird's whistle, you come.
When you hear
a songbird's whistle, you come.](data:image/png;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs=)
When you hear
a songbird's WHISTLE, you come.
Game of Thrones Season 3, Episode 9
![-(FLIES BUZZING)
-(TRAIN WHISTLE BLOWING)
-(FLIES BUZZING)
-(TRAIN WHISTLE BLOWING)](data:image/png;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs=)
-(FLIES BUZZING)
-(TRAIN WHISTLE BLOWING)
Westworld Season 2, Episode 5