Find the noise. Measure the level. See whether your adjustment helped.
Decibel Meter & Sound Spectrum brings a sound-level meter, frequency analysis, and guided sound checks together for audio engineers, musicians, venues, technicians, and anyone investigating a noise.
FREE DOWNLOAD: SIMULATED DEMO
Explore the instruments with a clearly labeled simulated signal. The free demo does not turn on your microphone. Live measurement and Pro tools require Spectrum Pro.
GUIDED SOUND CHECK
Choose Hum & Buzz, Feedback Tone, or Venue Sound Check. Watch the live level and strongest frequencies, then capture ten seconds before and after an adjustment. Compare the average level and strongest 1/3-octave bands. Keep both original readings on your device, share a PDF, or export the original data.
Capture waits for a reliable live measurement. If microphone access or a fresh reading is unavailable, the app explains what to check. A direct Back control returns you to the main instruments. For meaningful before-and-after results, use the same position and matching microphone, calibration, and measurement settings. Relative tone strength helps follow a frequency; it does not identify the source of a sound.
PRO INSTRUMENTS
• Estimated SPL, Leq, Lmin, Lmax, Hold, and peak frequency
• A, B, C, Z, and ITU-R 468 weighting; Fast, Slow, and Impulse response
• 1/3-octave RTA, FFT, bars, line, and scrolling waterfall views
• System RTA, Feedback, Hum, and Waterfall analyzer presets
• Named calibration profiles and guided comparison with a trusted physical meter
• Saved sessions, field reports, and estimated noise dose
IPAD CONTROL ROOM
See SPL, RTA, FFT, level history, waterfall, and dose together from one microphone stream. Tap a panel to expand it, then close it to return to the six-instrument overview. Compact iPhone layouts show one instrument at a time.
MORE TOOLS
Camera overlays, configurable loud-noise alerts, Live Activity and Dynamic Island, and optional iCloud backup for saved sessions and calibration profiles. Sound Check comparisons are stored locally and can be exported separately.
Apple Watch is a remote for the active iPhone session. It uses neither the Watch microphone nor HealthKit.
SPECTRUM PRO PRICING
U.S. prices: $1.99 per week, $6.99 per month, $49.99 per year, or $79.99 for a one-time Lifetime purchase. Apple shows your current localized price before purchase. Existing Lifetime purchases and unexpired legacy Seven-Day Pro Passes remain honored.
Weekly, monthly, and annual plans are auto-renewable subscriptions. Payment is charged to your Apple Account at confirmation. Plans renew unless canceled at least 24 hours before the current period ends. Manage or cancel in your Apple Account subscription settings. Lifetime is a one-time purchase.
ACCURACY AND PRIVACY
Phone and tablet readings are estimates. This is not an IEC/ANSI Type 1 or Type 2 meter, a certified dosimeter, or a replacement for required safety equipment. Use a trusted reference and consistent positioning for meaningful comparisons.
Microphone audio is processed on device and is never recorded or uploaded. Optional iCloud backup is off by default. No tracking.
Privacy Policy:
https://gqbunny.com/decibel-meter-sound-spectrum-privacy.php
Terms of Use (Apple Standard EULA):
https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
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