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Cone Of Silence

Posted on Sunday, April 2nd, 2023

This is the first revision which includes an enclosure for all the components. This Design requires a wired connection for the device to function and a simple amplification circuit in order to obtain a frequency range of 24-26kHz which can be detected by a device's microphone.

Client Dan Monafu
Professor(s) Mauricio Ledon
Program Electrical Engineering technology
Students Caleb Smith, Adam Cacciotti

Project Description:

The Cone of Silence is designed to emit ultrasonic frequencies, which are frequencies that are parsed as audible frequencies by microphones (24kHz to 26kHz). The device acts as an effective white noise generator to counteract microphones on digital devices. The device is designed to function with a power supply, which is charged via a USB-C connection. It also has a potentiometer which will interact with the amplifier circuit to control the effective radius of the device.


Short Description:

The Cone of Silence is a product that is used to inhibit conversations to pass through a device’s microphone. The Cone of Silence will allow people to have private conversations without the risk of having their microphone eavesdrop on them.


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This is the first design of the Cone of Silence. This revision uses a two-Level array of transducers with the intention of having as large of a coverage as possible and for that reason did not have the intended cone shaped design. This is the second design to be considered for the Cone of Silence. It was intended to solve the issue of wave destruction that the Two-Level Array design had. The design also has a taller and more conical shape to it.


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