Sound Sources for Room & Building Acoustics: Dodecahedron, Impulse, or 2.5 kg Chirp?
Whether a classic 360° dodecahedron for building and room acoustics (incl. demo units at 30% off and weekly rental), a battery-free impulse clapper for quick checks, or the revolutionary Akulap chirp method (0.3–10 W instead of 1,600 W pink noise): Find the ideal sound source for your analyzer in 4 interactive steps.
The Sound Source & Method Tunnel: How Do You Want to Measure?
Answer these 4 practical questions – our engineering calculator immediately computes the sound pressure and amplifier power you actually need on-site.
💡 The Result for Your Back and Budget: Instead of 1,600 Watts of noise power and 15–50 kg speaker rigs, a 16-second chirp requires just 0.3 W to 2 W. You can measure large halls, churches, or noisy offices using our 2.5 kg active speaker (Art. 6002) or via Bluetooth with Akulap Mobile!
Dodecahedrons, Demo Specials (-30%), Impulse Sources & Chirp Active Speakers
Whichever method you choose, we supply the matching sound source from our Dresden lab – brand-new, as a lab-certified demo unit at a discount, or via weekly rental with 100% rent-to-own credit.
1. Lab-Certified Dodecahedron & Amplifier Demo Deals (Category 28)
From our demonstration and laboratory fleet: Fully verified on our Audio Precision APx555 with full warranty and significant savings.
Ntek OMNI 4 HP omnidirectional soundsource Demo unit
12 loudspeakers as an omnidirectional soundsource
Ntek Power amplifier Demo Unit 30% off
Power amplifier 700W RMS for building acoustics
2. Compact Chirp Active Speakers (2.5 kg) & Battery-Free Impulse Sources (0.5 kg)
Our recommendation for back-friendly field work: The 2.5 kg active speaker for Akulap chirp measurements plus impulse clappers and FRI sources.
active loudspeaker for room acoustics
active loudspeaker for room acoustics
Package for room acoustics
With this package you can measure various parameters for room acoustics
3. Classic 360° Dodecahedrons & Power Amplifiers (Buy & Weekly Rental)
Whenever tenders, building acoustics (ISO 16283), or open-plan office audits (ISO 3382-3) mandate 360° omnidirectional radiation. Weekly rentals include 100% rent-to-own credit towards new Akulap, Ntek, or Lookline equipment!
Ntek OMNI 4 LT omnidirectional soundsource
lightweight omnidirectional soundsource with 12 loudspeakers
Lookline omnidirectional soundsource active
12 loudspeakers as an omnidirectional soundsource with built-in amplifier
4. Specialized Sources: Calibrated STIPA TalkBoxes & Impact Sound Tapping Machine
DSP-equalized artificial mouths (Bedrock TalkBox BTB65 / BTB115 with laser) for firefighter paging mics per IEC 60268-16, plus our standard tapping machine per ISO 16283-2 / DIN 140.
Bedrock BTB115 Advanced TalkBox
calibrated soundsource for STIPA IEC60268-16
Akulap & Akulap Mobile: Turn Your Smartphone, Tablet, or Laptop into a Standard-Compliant Acoustic Lab
Akulap Mobile is far more than a consumer app – it brings the battle-tested DSP engine of our Windows suite Akulap natively to Android and Windows (iPhone/iOS coming soon). Measure RT60 (via Bluetooth chirp!), speech intelligibility (Full-STI), and sound levels (IEC 61672) completely offline in the field.
Akulap Web vs. Akulap Mobile vs. Akulap PC – What Are the Differences?
1. Akulap Web (Browser Tools)
Rapid measurement and analysis tools running directly in your browser without installation (live FFT, 1/3-octave RTA, WAV inspector).
2. Akulap Mobile (Included with Akulap!)
Full native app. 100% offline field operation, internal database, chirp output via Bluetooth or cable, external USB mic support up to Microtech Gefell MV240 (6.5 dB(A) – 160 dB), and direct cloud export to the RAP room acoustics planner.
3. Akulap Windows PC Suite
The complete laboratory and consulting suite: Includes DIN 45680 & DIN/TS 45610-1:2026-01 low-frequency analysis, psychoacoustics (time-varying loudness in Sone), building acoustics (ISO 16283), and up to 64 ASIO channels.
RT60 Chirp (incl. Bluetooth!) + Automatic Full-STI
Supports Log-Sweeps (Chirp), Impulse, and Interrupted Noise. Best of all: From the exact same chirp impulse response, Akulap Mobile automatically computes the Speech Transmission Index (STI) and MTF matrix per IEC 60268-16 with zero extra measurement time!
Precision Sound Level Meter & Chained WAV Recording
Real-time 1/1 and 1/3-octave RTA (A, C, Z weighting), simultaneous LAeq, LCeq, LAFmax, LCPeak, time-history export (CSV/JSON/vector graphics), acoustic calibrator support, and chained long-term .wav recording.
Ensemble Averaging & Automatic Outlier Rejection
Harnesses mobile SIMD processor instructions for real-time DSP. Ensemble averaging boosts SNR across multiple sweeps, while automatic outlier detection isolates measurements corrupted by transient noise.
Local HTML Reports & Direct RAP Cloud Export
All measurements are stored 100% offline in an internal database with instant on-site HTML report generation. Optionally export data directly into the web-based Room Acoustics Planner (RAP) by Fuchs Raumingenieure.
🔑 Licensing & Google Play Store Download: Akulap Mobile Is Part of Your Akulap License!
We do not sell Akulap Mobile as a stripped-down consumer toy, but as a professional mobile companion for our Akulap users: Every valid Akulap license (version 2026 and newer) unlocks Akulap Mobile! Without a login, you can test the app for free in demo mode (400 Hz – 2 kHz).
Custom Acoustic Solutions for Hardware Manufacturers, Test Institutes & OEMs
Do you manufacture acoustic hardware (speakers, absorbers, microphones) or need a custom testing app under your own brand? We offer Akulap Mobile and our C++/SIMD DSP engine as a customizable B2B platform:
Full visual customization (logo, colors, naming) so the app operates as your proprietary company tool.
Tailored exclusively to your microphones, speakers, or interfaces with pre-loaded calibration profiles.
Integration of proprietary metrics, end-of-line production QA routines, and encrypted ERP/cloud uploads.
License our verified C++/DSP libraries (or full source code upon agreement) for your own software.