Android Frequency and Decibel Calculator

Hi I need an Android app which captures Audio Frequencies and display the Frequencies and Decibels continuously. Sampling rates should be selectable to increase FFT resolution. (drop down with sampling rates 512,1024,2048,4096..etc) I dont need graphs,I just want the frequencies and decibels of that particular frequency to be displayed in TextViews. Accuracy is the most important factor. Frequency detection range should be above 15000 Hz. (I want to detect the frequencies above 15000 Hz and to detect the sound pressure/sound intensity of that particular frequency) Interested developers who are familiar with FFT can contact me. Reference Apps: [login to view URL]