Published November 12, 2025

Noise Notifier

Let's people know they're too loud and won't stop until they're quiet again.

BeginnerShowcase (no instructions)70

Things used in this project

Hardware components

SparkFun Sound Detector (with Headers)

Particle Photon 2

Breadboard (generic)

active buzzer

Software apps and online services

Particle Build Web IDE

Hand tools and fabrication machines

Just any tiny Screwdriver

Story

Background:

Haven't done coding in a while and have no experience physical computing
Wanted to make something simple but useful
Have roomed for my sister FOR LIFE, at this point I'm forced to believe she cannot be self-aware of how loud she is

Concept:

Device that would pick up high noise level and sound buzzer, notifying person they're too loud and going back down when it's done
Person (specifically sister) would be provoked to think "maybe my sister isn't crazy and I am loud if a literal tool says so" and will be more quiet in general

Action:

-Decided to test noise sensor with LED bulb, having it turn on when certain noise threshold was reached

https://drive.google.com/file/d/1r5gRCvcH1WWB3FaxsaVGtEzgOkZWrQCs/view

Had to adjust w/ tiny little screwdriver

-Eventually figured it out after adjusting sensitivity and got sound sensor to work for a sensitivity that would turn the light on:

https://drive.google.com/file/d/1_HO9akbAXRmhsLvcua8L-aMEOO4pMtV2/view

Problem:

Testing w/ buzzer beyond just getting reaction from sound through LED led me to discovering just how not good the sensitivity was for the kind of problem I had: only picked up close sounds or, loud sharp noises
Overall this problem was really big to its whole purpose, unable to get it to work for noise like a person across the room, I concluded that it did not satisfy my previous expectations

https://drive.google.com/file/d/1ck7ffcW1LWbX7-mlreUPuZkra5gCcGGK/view?usp=sharing

End Product/Conclusion

-Overall had a lot of fun and have realized how easy/accessible and useful stuff like this is, and I'm really excited to continue physical computing!

-Specifically with this project, I still really like the idea, so I would definitely try again with a better sound sensor

-Very helpful in teaching me how to find correct documents and research online, just asking for help bc a problem could be really small, and overall to take notes along the way because it's really useful along project and potentially for future one as well

Final Code

 int soundSensorPin = A0; 
 int buzzerPin = D1;       

 //int soundThreshold = too loud level; 

void setup() {
  Serial.begin(9600);       
  pinMode(buzzerPin, OUTPUT); 
  digitalWrite(buzzerPin, LOW);
}

void loop() {
  int soundLevel = analogRead(soundSensorPin); 
  Serial.println(soundLevel);               

  if (soundLevel > soundThreshold) {
    digitalWrite(buzzerPin, HIGH);
  } else {
    digitalWrite(buzzerPin, LOW);  
  }

  delay(500); 
}

Credits

Trisha

1 project • 0 followers

Embed the widget on your own site

Noise Notifier

Noise Notifier

Things used in this project

Hardware components

Software apps and online services

Hand tools and fabrication machines

Story

Background:

Concept:

Action:

Code

Final Code

Credits

Trisha

Comments

Related channels and tags