BVCalc Lite vs Impulse Noise Decibel Meter

Calculate with confidence. BVCalc Lite combines live-updating algebraic entry with an RPN stack that shows the full expression behind every value. Reuse past work with a tap, switch modes anytime, and audit every step. Upgrade to BVCalc to unlock • Unlimited history tape & memory (Lite supports up to 2 items in memory and 4 calculations in the history tape) • Additional color theme & settings • No helper popups on scientific keys • Full external-keyboard letter shortcuts Core features in Lite • Live result as you type — no “=” key • Reuse expressions from the tape/stack, not just values • Shared tape/stack with readable infix history • Switch between Algebraic ↔ RPN mid-calculation • Touch-friendly stack gestures (tap to swap/roll) • Basic & Scientific keyboards; copy/paste; edit history • Color-coded parentheses, themes, high-contrast mode • Memory for reusable snippets • No ads BVCalc Lite makes partial-step workflows fast and reliable: what you see is the math you actually entered.

Firearm Noise Testing | Sound Level Meter helps you monitor sound levels (dB) in real time. It’s designed for very loud environments such as workshops, concerts, and outdoor ranges, so you can make better hearing-safety decisions. The app uses your phone’s microphone to estimate sound pressure level and shows current, minimum, average, and maximum readings with clear visual feedback. Key features • Real-time decibel meter (dB) • Min / Avg / Max tracking • A-weighting (dBA) for everyday noise (closest to human hearing) • C-weighting (dBC) for very loud environments and peak levels • Linear mode for raw/technical readings (no filtering) • Sensitivity calibration (+/−) to compensate for device microphone differences • Clean, readable interface for quick checks Important notes • This app is not a certified or laboratory-grade sound level meter. Readings vary by device model, microphone hardware, phone case, distance, and environment. • For general information and personal awareness only. Not intended for legal, regulatory, medical, or workplace compliance measurements. • Very loud sounds can damage hearing quickly. Always use appropriate hearing protection in loud environments. Privacy • Microphone input is used only to calculate sound level. • We do not sell personal data.