RT60 vs AcousticPro SPL RTA RT60

Now you can have an RT60 measurement tool for the iPhone. Another in the series of acoustic analysis and test applications from Studio Six Digital, RT60 measures reverb decay time for each octave band, 63Hz - 4kHz, by pulsing pink noise on and off, filtering the incoming signal by octave band, and measuring the timing of the decay of each octave band. RT60 conforms to international acoustics standard ISO 3382 for measuring room decay time (RT) using either the T20 or T30 method. RT60 will measure down to 50ms, and up to 4 seconds. Results are displayed for each band above the band, and the overall RT60 is calculated and displayed on the top of the screen. RT60 requires at least 25dB of headroom between the noise floor of the environment, and the level of the pink noise for T20 analysis. Turn up the amplifier to get more headroom. To use RT60, connect the iPhone output to the input of an amp and speaker, and carefully turn up the level after you tap the Generator icon. RT60 smoothes the results of several readings to get a more stable result. *** Screen Graphics The red bars are the current SPL level for each octave band. The thin black bars show the most recently measured maximum and minimum dB levels for the octave band that the RT60 calculation is using. The vertical yellow bars show the decay range that is available. Note that in some situations, you may not be able to overcome the ambient noise level in the room to get a good reading in every band. *** Calculations If a valid RT60 time can be computed, it is shown above the yellow bar. If it cannot be computed, no bar or value is shown. When your analysis is complete, you can save the graph image to your photo roll to include in a report. *** Calibration & Microphone Like all of the Studio Six Digital apps, RT60 can be calibrated. We set this field to the typical iPhone value, but if you have access to a calibrated SPL meter you can adjust this number as needed. There is a field to select Internal or External microphone. When Internal is selected, a compensation network is used to compensate for the response of the built-in or headset mic. When External is selected, no compensation is done. See our web site for more detailed information. Also, check out our other great audio and acoustics apps: AudioTools, SPL, SPL Graph, for recording SPL over time, RTA, ETC, FFT, Generator, and Speaker Pop. And, if you are looking for a great range of high-quality, professional, audio test equipment, check out iTestMic, iPrecisionMic, or liAudioInterface2.

AcousticPro is a professional sound level meter and acoustic diagnostics workspace for acoustic consultants, sound engineers, AV integrators, facility teams and B2B clients. Use it to monitor SPL, inspect RTA/FFT spectrum behavior, compare RT60 results and turn field measurements into premium PDF reports. Professional acoustic workflows: - SPL monitoring for rooms, venues, offices, studios, schools and industrial spaces - RTA spectrum analysis to locate peaks, noise bands, tonal imbalance and frequency problems - RT60 comparison for before/after acoustic treatment, room tuning and acceptance checks - Offline project storage for sites, rooms, measurements and notes - Premium PDF reports for corporate documentation, client handoff and internal QA Built for repeatable diagnostics AcousticPro is organized around projects instead of isolated readings. Keep site context, compare measurements across sessions and document the acoustic evidence your team needs when decisions depend on clear data. Why professionals use AcousticPro: - Combines SPL, RTA spectrum analyzer and RT60 tools in one mobile app - Keeps measurement history available offline for field work - Supports before/after comparison for acoustic treatment and commissioning - Produces clean charts and exportable PDF reports for clients and stakeholders - Uses familiar acoustic terms: decibel, sound pressure level, FFT, spectrum and reverberation time Typical use cases: - Room acoustic surveys - Studio, rehearsal room and worship space tuning - Office, classroom and meeting room noise checks - AV installation validation - Facility maintenance and compliance documentation - Corporate acoustic reports for consulting projects AcousticPro is designed for professional acoustic review and documentation. For projects that require traceable accuracy, follow a consistent measurement method and use a calibrated external microphone.