Frequency Analyzer vs Nightlong

Transform your device into a professional-grade audio analysis suite with industry-leading 32-bit float processing, precision calibration tools, and comprehensive visualization capabilities. PROFESSIONAL ACOUSTIC MEASUREMENT • Real-time FFT analysis with configurable window sizes up to 4096 points • Reference SPL measurement with calibrated sound pressure level monitoring • Professional microphone correction with frequency-specific calibration curves • Reference tone calibration for precise frequency measurements • Configurable time averaging (0-1000ms) for stable, accurate readings • Industry-standard weighting filters: dBA, dBC, dBZ, and linear magnitude • Multiple window functions: Hanning, Hamming, Blackman ADVANCED VISUALIZATION MODES • High-resolution spectrum analyzer with peak detection • Real-time waveform display • Professional spectrogram • Octave band analysis • Amplitude tracking over time • Total level monitoring with min/max/average statistics POWERFUL RECORDING & ANALYSIS • High-quality 32-bit float audio recording and playback • Synchronized video recording with audio analysis overlay • Event tracking system with timestamped notes • Playback synchronization with all recorded events and measurements • Location mapping for environmental noise surveys • Export capabilities: WAV audio, CSV data, high-resolution images and videos PRECISION DECIBEL MEASUREMENT • Calibrated SPL measurements with reference level adjustment • Real-time dB monitoring with peak hold functionality • Statistical analysis: Leq, Lmax • Configurable time averaging (0-1000ms) • Frequency-weighted noise exposure calculations • Exposure calculator for NIOSH and OSHA IDEAL FOR PROFESSIONALS • Acousticians and audio engineers • Environmental noise consultants • Musicians and sound designers • Room acoustics optimization • Industrial noise monitoring • Educational and research applications • Live sound reinforcement • Building acoustics assessment Download now and unlock the full spectrum of acoustic measurement capabilities. DISCLAIMER This is a consumer application designed for general audio analysis and educational purposes. It is not a certified measurement instrument and should not be used where legally compliant or certified measurements are required. For professional acoustic assessments requiring traceable calibration or regulatory compliance, we recommend using an external calibrated measurement microphone with certified sound level meters. EULA: https://frequency-analyzer.com/terms-and-conditions/

Nightlong plays sleep sounds that do not stop. No eight-hour cut-off. No buffering. No subscription. Most sleep apps stream recordings, so they need a connection and they end after a fixed number of hours. Nightlong has no recordings. It generates its sound mathematically, live on your device, sample by sample. There is no file, so there is nothing to download and nothing to run out of. Press play and it keeps going until you press stop, through the whole night and past it. TWELVE SOUNDS Noise colours - White. Flat and even, the strongest masker - Pink. Balanced hiss, the usual first choice - Brown. Deep and rumbling, soft on the ear - Green. Mid-forward, like open air - Blue. Bright, often used for tinnitus - Violet. Brightest, covers high ringing - Grey. Shaped to sound flat to the ear Ambience - Rain. Steady rainfall, no thunder - Ocean. Slow rolling surf - Fan. A box fan across the room - Cabin. Aircraft cabin rumble - Stream. Water running over stones WORKS WITH NO SIGNAL Nothing is streamed and nothing lives on a server. Aeroplane mode, a tent, a basement, a long flight: it makes no difference. NEVER LOOPS A looping recording always has a seam you eventually learn to hear. Nightlong never repeats, because there is nothing to repeat. MATCHED LOUDNESS Every sound is tuned to the same perceived loudness, so changing sound in the dark never startles you awake. BUILT FOR THE WHOLE NIGHT - Keeps playing when the screen locks - Lock screen and Control Center controls - Survives phone calls and headphones being unplugged - A dim, dark interface made for a dark room - Gentle fade in and out - An optional sleep timer, if you do want it to stop NO ACCOUNT, NO TRACKING No sign-up. No analytics. No data collection of any kind. The app makes no network requests at all. About 3 MB.