Is it too strong? This Arduino Device Will Do The Hush For You
Is it too strong? This Arduino Device Will Do The Hush For You
Arduino Team — April 14, 2023
Whether it's a library, a conference room, a classroom or other public space, sometimes we all need peace and quiet to work, but getting there can be a challenge. After wondering if loudmouths could be automatically told to shut up via some sort of sensor-driven system, Bas op ten Berg, the founder of BotBerg, chose to build one using just a few components. /p>
Its smart shusher is based on the Arduino Nano 33 BLE Sense board and its built-in MP34DT05 MEMS microphone element. By reading the Pulse Density Modulation (PDM) value from the output pin, he could easily convert it to sound pressure, and therefore ambient noise level. Adjustment of the noise floor is done by carefully adjusting a connected potentiometer which is read several times per second from an analog input pin. When the set threshold is exceeded for a predetermined time, a DFRobot MP3 player module triggers and plays a sound file containing the phrase "Pssst, silence please!" Quiet please!" which is sure to pique anyone's interest. All parts are housed in an equally eye-catching 3D printed underside so it appears to be talking.
Beyond this local and offline functionality, op ten Berg offers other ways to extend the project, including ideas such as BLE connectivity, additional sounds/lights or even the activation of a relay. More details can be found on its website.
Arduino Team — April 14, 2023
Whether it's a library, a conference room, a classroom or other public space, sometimes we all need peace and quiet to work, but getting there can be a challenge. After wondering if loudmouths could be automatically told to shut up via some sort of sensor-driven system, Bas op ten Berg, the founder of BotBerg, chose to build one using just a few components. /p>
Its smart shusher is based on the Arduino Nano 33 BLE Sense board and its built-in MP34DT05 MEMS microphone element. By reading the Pulse Density Modulation (PDM) value from the output pin, he could easily convert it to sound pressure, and therefore ambient noise level. Adjustment of the noise floor is done by carefully adjusting a connected potentiometer which is read several times per second from an analog input pin. When the set threshold is exceeded for a predetermined time, a DFRobot MP3 player module triggers and plays a sound file containing the phrase "Pssst, silence please!" Quiet please!" which is sure to pique anyone's interest. All parts are housed in an equally eye-catching 3D printed underside so it appears to be talking.
Beyond this local and offline functionality, op ten Berg offers other ways to extend the project, including ideas such as BLE connectivity, additional sounds/lights or even the activation of a relay. More details can be found on its website.
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