Difference between revisions of "User:Chotee/ultranoise"
| Line 1: | Line 1: | ||
= TLDR = | = TLDR = | ||
| − | What: Area denial for rodents by ways of random noise | + | * What: Area denial for rodents by ways of random noise |
| − | How: Get a bunch of tweeters and drive them hard at ultra-sonic frequencies. | + | * How: Get a bunch of tweeters and drive them hard at ultra-sonic frequencies. |
| − | When: When the space is closed. | + | * When: When the space is closed. |
| − | = | + | = Longer Explanation = |
The idea is to have a µC output random noise in the 25K to 70Khz range since it's very likely there's spillover into the <20K range, we hook it in so that it only runs then the space is closed. | The idea is to have a µC output random noise in the 25K to 70Khz range since it's very likely there's spillover into the <20K range, we hook it in so that it only runs then the space is closed. | ||
Revision as of 12:40, 3 April 2019
TLDR
- What: Area denial for rodents by ways of random noise
- How: Get a bunch of tweeters and drive them hard at ultra-sonic frequencies.
- When: When the space is closed.
Longer Explanation
The idea is to have a µC output random noise in the 25K to 70Khz range since it's very likely there's spillover into the <20K range, we hook it in so that it only runs then the space is closed.
Parts needed:
- MicroController with network
- Tweeters
- Amplifier that does these frequencies well (normal audio have low performance at these frequencies)
- Case/housing
- Some Indicator lights (power, network-ok, active)
- Power source.
Notes:
- Random patterns work best. Unpredictable patterns.
Ideas:
- Get the state from the MQTT topic
- Have a 5 min delay on the activation
Possible parts:
Similar commercial products:
References:
- About Ultrasound speakers: https://www.diyaudio.com/forums/planars-and-exotics/212650-ultrasound-speaker-20khz.html
