#1
Frequency Sound Generator - Sound Frequency Creator - Sound Wave Tone Generator
Frequency Generator Sound player lets you generate a sine, square, saw tooth or triangle sound wave with a frequency between 1Hz and 22000Hz (hertz). It produces accurate tone & soundwaves while being simple and easy to use.
#2
Sound Meter - Decibel meter & Noise meter | Sound Meter | Sound detector | |Android App | Admob ads
Sound level meter app is shows a decibel values by measure the environmental noise, displays measured dB values in various forms. You can experience tidy graphic design with high frame by this smart sound meter app.