Latest By
Category:


Armor
Artificial Intelligence
Biology
Clothing
Communication
Computers
Culture
Data Storage
Displays
Engineering
Entertainment
Food
Input Devices
Lifestyle
Living Space
Manufacturing
Material
Media
Medical
Miscellaneous
Robotics
Security
Space Tech
Spacecraft
Surveillance
Transportation
Travel
Vehicle
Virtual Person
Warfare
Weapon
Work

"People are choosing to allow television and Electronic Arts to do all their imagining for them."
- Peter Watts

Fenton Silencer  
  A device to cancel noise over a broad area.  

In this amusing story from Tales from the White Hart, one of the patrons of the pub tells the story of young Robert Fenton, who was stronger on practice than on theory - unfortunately.

"Doubtless some of you will already see what I am driving at, and will appreciate the basic principle of the Fenton silencer...

It consisted of a microphone, a special amplifier and a pair of loud speakers. Any sound that happened to be about was picked up by the mike, amplified and inverted so it was exactly out of phase with the original noise. Then it was pumped out of the speakers, the original wave and the new one cancelled out, and the net result was silence.

Of course, there was rather more to it than that. [But]... it's a simple application of negative feedback.

From Tales from the White Hart, by Arthur C. Clarke.
Published by Ballantine Books in 1957
Additional resources -

This is from Silence Please, the first story in this book of short stories, first published in 1957.

This story offers good engineering detail on noise cancellation; however, I think that Robert Heinlein's hush corner beats the Fenton Silencer by a nose, having been published in Double Star in 1956. Also, see the isolation barrage from Wandl, The Invader (1939) by Ray Cummings.

Thanks to Paul, who wrote in about this story in a comment on another technovelgy item.

Comment/Join this discussion ( 1 ) | RSS/XML | Blog This |

Additional resources:
  More Ideas and Technology from Tales from the White Hart
  More Ideas and Technology by Arthur C. Clarke
  Tech news articles related to Tales from the White Hart
  Tech news articles related to works by Arthur C. Clarke

Fenton Silencer-related news articles:
  - Noise-Cancelling Windows With Piezoelectric Patches
  - Speechjammer To End Your 1st Amendment Rights

Articles related to Engineering
Autonomous BADGER Robot Drilling Machine
'Liquid Light' Flows Around Corners
Does Earth's Middle Mantle Hold Oceans Of Water?
Anti AI AI Wearable Detects Artificial Voices

Want to Contribute an Item? It's easy:
Get the name of the item, a quote, the book's name and the author's name, and Add it here.

<Previous
Next>

Google
  Web TechNovelgy.com   

 

 

Technovelgy (that's tech-novel-gee!) is devoted to the creative science inventions and ideas of sf authors. Look for the Invention Category that interests you, the Glossary, the Invention Timeline, or see what's New.

 

 

 

 

More News

Autonomous BADGER Robot Drilling Machine
'The compacted matter... makes a better tunnel lining than concrete, don't you think?'

TALOS Exoskeleton Development Proceeding
'Suited up, you look like a big steel gorilla...'

Autonomous Robots Navigate Like Rats
'Out of warrens in the wall, tiny robot mice darted.'

SINTEF Robot Cleans Solar Panels
'The window cleaners, with large padded feet...'

Pangorin Restaurant Service Robots
What'll you have? Jawa juice?

Drug Creates Real Melanin Tan
I've used them all my life...

Medical Drones Hover Like Angels Near You
'The death-reversal equipment is on its way...'

SkEye Amazing Israeli Gigapixel Drone
'An eye that could not only see, but fly...'

How Rude! DARPA Wants Robots To Behave More Like Threepio
'Do I know protocol? Why, it's my primary function.'

'Liquid Light' Flows Around Corners
Light as a superfluid.

More SF in the News

More Beyond Technovelgy

Home | Glossary | Invention Timeline | Category | New | Contact Us | FAQ | Advertise |
Technovelgy.com - where science meets fiction™

Copyright© Technovelgy LLC; all rights reserved.