• Project:
    4kHz app
  • Year:
  • Tools:
    Illustrator and Photoshop

Protect your ears, prevent hearing damage. It’s common sense but difficult to carry out when a lack of awareness creates a gap between theory and practice. From youngster visiting concert venues up to professionnel usage in noisy working environments. The 4kHz app is capable of monitoring its users environmental noise and listening habits. It creates insights about peak volumes on short term and the effects of moderate volumes on long term usage. Without being pedantic, this app will be honest to its user.

Monitor tab

This app is all about gathering data to be analysed by its user. To make a profile, the user enters its gender, age, type of smartphone and type of headphone. The more specific the data, the better the app can identify critical situations. The 4kHz app will monitor the decibels of the environment via the microphone and the volume output on the mini-jack. The duration and location are linked to these values. The app translates complex real-life situations into an easy to understand rating for every specific moment.

Data tab

The app is divided into five tabs which are attainable by swiping horizontally. The monitor tab is the starting point, here is where the data collection is set and the live stream is visible. The gathered input is presented at the data tab. The users is able to use filters such as timeframe, location, marks and tags. The map tab presents an overview of the users marks as a layer on top of a map. The last two tabs, decibel meter and hearing test, are useful tools which operate outside the data collection.

Map tab

User Interface
A substantiated user advice should be based on a significant amount of data. Those amounts are only available if the app is used frequently, or even better, continuously. To stimulate this long term usage, a repeated short term satisfaction is created. The monitor interface is organized to gather insight in the live data feed. The core of this tab is the characteristic chart, which visualises the current rating. The marker rates from zero as minimum to ten as maximum hearing load. Another short term satisfaction is the visualisation of live background data. The user could access this by swiping vertical from the bottom.

The user group consists of all ages and will use the 4kHz app for the most diverse reasons. Therefor the user interface is as neutral as possible. A flat UI design ties in well with this task. So no gradients or effects are applied and the color scheme is reduced to three basic colors.

Decibel and test tab

Business case
4kHz creates an independent and reliable insight in the hearing habits of its user. The power of the app lies in being unobtrusive, educational without being pedantic.

4kHz is free and ad free. Profit is made at two types of revenue. First, the collected anonymous data could be sold for research or marketing. Secondly a paid version of the app will be available. This version contains added functionality for companies, such as creating group databases with unlimited users and exporting the database. This allows the paid user to exchange its data with other software.


Hearing damage is most common around 4kHz, the resonance frequency of the human ear.

© Copyright - Frank van der Walle