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A Recast of ‘Twenty Thousand Hertz’

The secrets, stories, and science behind what you hear.

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Recast is a podcast rebroadcasting service. You can get your own personalised feed of a podcast which will deliver you the episodes from the start at a schedule of your choosing.

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Recastable Episodes (218)

1. Becoming the voice of Siri… by accident? Nov. 1, 2016
2. The NBC Chimes: How three notes made history Nov. 15, 2016
3. How 8-Bit sounds became iconic Nov. 29, 2016
4. The Windsor Hum: Canada’s Most Mysterious Sound Dec. 13, 2016
5. Sounds We've Lost: Echoes of the Past Dec. 27, 2016
6. From Analog to Digital (and back again) Jan. 10, 2017
7. Inside Movie Soundtracks: How every layer tells a story Jan. 24, 2017
8. Audio Descriptions: Not just for the visually impaired Feb. 7, 2017
9. Car Sounds: Crafting every click, rev, and beep Feb. 21, 2017
10. Dolls That Talk (and some that listen) March 7, 2017
11. What do other planets sound like? March 21, 2017
12. Foley: Hollywood’s hidden sound heroes April 4, 2017
13. From Screams to Serenity: How sound shapes us April 18, 2017
14. Hearing Loss: What causes it and how to prevent it May 2, 2017
15. The voices behind Dragon Ball Z & Firewatch May 16, 2017
16. The Wilhelm Scream: Hollywood’s most iconic sound effect May 30, 2017
17. Forensic Audio: How sound solves crimes June 13, 2017
18. Evolution of Accents: From Shakespeare to Valley Girl June 27, 2017
19. Silent Sea: Whalesong & Undersea Noise Pollution July 11, 2017
20. Noise Pollution: The hidden costs July 25, 2017
21. Sound Firsts: Landmark recordings in history Aug. 8, 2017
22. Fight or Flight: Why airplane sounds make us anxious Aug. 22, 2017
23. Sonic Seasoning: Can sound affect our taste buds? Sept. 5, 2017
24. Watergate: How a tape recorder brought down a president Sept. 19, 2017
25. Level Up: How video games tell an immersive story through sound Oct. 3, 2017
26. Acoustical Umbilical Cord: Why crying makes us human Oct. 17, 2017
27. Spooky Sounds: The secrets of horror sound design Oct. 30, 2017
28. Disney Parks: How Imagineers use sound to enchant visitors Nov. 13, 2017
29. Let It Beep: The rise and fall of the Mac startup chime Nov. 27, 2017
30. Facebook & Google Pixel: Designing the perfect alert sound Dec. 11, 2017
31. The Gift: Dr. Amar Bose’s audio legacy Dec. 25, 2017
32. 314-914-6093: When Michelle Obama tweets your phone number Jan. 8, 2018
33. Six O'Clock Soundtrack: The art of TV news music Jan. 22, 2018
34. Muzak: How background music took over the world Feb. 5, 2018
35. False Alarm: How the Emergency Alert System went wrong Feb. 19, 2018
36. Hamilton: Crafting the sound of the Broadway smash hit March 5, 2018
37. Epileptic Symphonies: Turning seizures into music March 19, 2018
38. Hidden Melodies: Discovering the music in our speech April 2, 2018
39. Broadway to Cirque du Soleil: Sound design for the stage April 16, 2018
40. ASMR: Why certain sounds give you tingles April 30, 2018
41. Ultrasonic Tracking: Are our phones really listening to us? May 14, 2018
42. Amen Break: The world’s most sampled drum beat May 29, 2018
43. The THX Deep Note: From chaos to cinematic legend June 11, 2018
44. THX Deep Note Part 2: How a lost file shaped movie history June 25, 2018
45. Misophonia: Why we can't stand certain sounds July 9, 2018
46. Slot Machines: The addictive power of sound July 23, 2018
47. Loop Groups: The art of movie background chatter Aug. 6, 2018
48. “Intel Inside” and other sonic branding brilliance Aug. 20, 2018
49. Jingles: How they hooked us and why they vanished Sept. 4, 2018
50. Behind the Mic: The making of Twenty Thousand Hertz Sept. 17, 2018
51. Cartoon Sound Effects: From Steamboat Willie to The Jetsons Oct. 1, 2018
52. Theremin: The instrument that defined classic sci-fi & horror Oct. 15, 2018
53. Theater for the Mind: The Golden Age of radio dramas Oct. 29, 2018
54. The Xbox Startup Sound: Crafting a console classic Nov. 12, 2018
55. Being George Clooney: Dubbing Hollywood celebrities Nov. 26, 2018
56. Boots ’n Cats: The scientific secrets of beatboxing Dec. 10, 2018
57. A sonic journey through the Solar System Dec. 26, 2018
58. Introducing Twenty Thousand Hertz Aug. 1, 2020
59. Silence: Dispatches from the quietest place on Earth Jan. 14, 2019
60. Blue! 42! How helmet radio changed the NFL Jan. 28, 2019
61. Do Not Disturb: The unseen impacts of alarms and alerts Feb. 11, 2019
62. Dining on Decibels: Why are restaurants so noisy? Feb. 25, 2019
63. The Booj: The secret sound formula behind blockbuster trailers March 11, 2019
64. Phone Tones: The hidden language of phone number beeps March 25, 2019
65. Bird Translation Guide: Decoding Tweets, Hoots, & Warbles April 8, 2019
66. The Voyager Golden Record: Humanity’s message to the cosmos April 22, 2019
67. Sound Escapes: Nature’s untouched soundtrack May 6, 2019
68. Mother of Dragons(sounds): Game of Thrones’ bittersweet sounds May 20, 2019
69. Sonic Illusions: Can you really trust your ears? June 3, 2019
70. Plants That Listen (and some that sing) June 17, 2019
71. Deaf Gain: The promise and controversy of cochlear implants July 1, 2019
72. Soundmarks: AT&T, United Airlines, and inventive sonic branding July 15, 2019
73. 808: The drum machine that changed music forever July 29, 2019
74. What makes Stradivarius violins so special? Aug. 12, 2019
75. Hear Here: The messy history of architectural acoustics Aug. 26, 2019
76. From Spinal Tap to The Simpsons: Voice acting w/ Harry Shearer Sept. 9, 2019
77. You’ve Got Mail: The voice behind AOL Sept. 16, 2019
78. The [COMPRESSED] history of music mastering Sept. 23, 2019
79. The Loudness War: Can streaming finally end it? Oct. 7, 2019
80. The Price is Right: The drama behind TV’s catchiest theme song Oct. 14, 2019
81. Virtual Choir: 8,000 Voices, One Song Oct. 21, 2019
82. Baby Shark: From summer camp song to viral earworm Nov. 4, 2019
83. Vroom Vroom: The symphony of high-performance engines Nov. 18, 2019
84. Historically Speaking: How language & accent shape your brain Dec. 2, 2019
85. Sonic Wonderland: The world’s most incredible sounding places Dec. 16, 2019
86. The Seinfeld theme song w/ Composer Jonathan Wolff Jan. 8, 2020
87. 4’33”: John Cage’s revolutionary “silent” musical piece Jan. 22, 2020
88. Good Vibes: Unlocking music’s hidden power over your brain Feb. 5, 2020
89. Noise “R” Us: The evolution of noisy toys Feb. 19, 2020
90. Satanic Panic: Backwards messages and '80s hysteria March 4, 2020
91. Cremona: Saving the world’s most prized violin sounds March 18, 2020
92. Twenty Parts Per Thousand: Designing with smell April 1, 2020
93. What’s Up, Doc? Mel Blanc and the magic of Looney Tunes April 15, 2020
94. That’s All Folks! Mel Blanc’s curtain call April 29, 2020
95. Help us win a Webby! May 3, 2020
96. Pew Pew! The making of Star Wars’ iconic sounds May 13, 2020
97. Makin’ Whoopee: The hilarious history & science of fart sounds May 27, 2020
98. Copyrights & Wrongs: Musical Inspiration vs. Plagiarism June 10, 2020
99. Stop, Collaborate and Listen: Can you copyright a vibe? June 24, 2020
100. Hamilton’s Sonic Secrets: Behind the Broadway phenomenon July 8, 2020
118 more episodes