How loud is the noise? Whether sound or noise is considered (too) loud or not is often subjective. The App Decibel enables one to measure the noise level and make it objective. It is a sensor that shows the results in three different ways: digital, analogue and in a graphical. There are many Decibel Apps but some show the results of the measurement only anlogue, and some analogue + digital but not graphical. When using this App in class students should be aware of how they measure, what to pay attention to so that results can be compared. Factors influencing the measurement could be: the distance to the source, the direction of the sensor/phone, pitch of the sound, background noise etc.
Combining the use of the App with the screenprint function of the device makes it possible to record, store and present the measurements at a later stage.
Students could plot their own measured sounds on a scale: unplugged musical instruments, birds, voices, traffic etc. There are plenty charts on the internet that show which levels are dangerous and damaging.
|Hardware|| iPhone, iPad
|Requirements||iOS 8+ (similar Apps are available for Android and on Google Play)|