Measure Low-Frequency Hum per DIN 45680 Yourself: The Standardized Weekly Rental Kit (#1202m)
Low-frequency noise immission between 8 Hz and 100 Hz—caused by air-source heat pumps, commercial cooling units, HVAC systems, or transformers—cannot be reliably captured with basic sound level meters. At the same time, commissioning an on-site acoustic consultant typically costs between €2,500 and €3,500.
To provide you with a metrologically accurate document for landlords, neighbors, or authorities at a fraction of consultant fees, we offer complete rental kit #1202m as a standardized weekly self-service package: You receive via DHL a factory-calibrated low-frequency USB measurement microphone with calibrator, the full Akulap software suite (featuring automatic 4-page DIN 45680 PDF export), and our proprietary expert AI evaluation bridge supplied exclusively with the rental kit.
Precision USB measurement mic down to the infrasound range incl. calibrator & certificate.
Automatic 1/3-octave analysis (8–100 Hz), hearing threshold check, tone test & WAV logging.
Proprietary template included in the rental kit translates the Akulap PDF into a 5-page written report.
Weekly Rental: Complete USB Audio Measurement System DIN 45680 (#1202m)
Turnkey professional system for your own Windows laptop/PC to investigate low-frequency hum (heat pumps, cooling units, HVAC) according to DIN 45680 and TA Lärm.
- • Factory-calibrated low-frequency USB measurement microphone (no adjustable knobs) incl. calibrator & certificate
- • Akulap software (full version): Long-term logging, 1/3-octave analysis (8–100 Hz) & 4-page DIN 45680 report
- • Includes video instructions and our proprietary expert AI evaluation bridge
- • Pure self-service rental; booking and current terms managed directly in the online shop
Inspect Both Original Sample Documents Before You Rent
So you can see before ordering in our online shop exactly what results you will achieve with rental kit #1202m—and where the boundary lies between an economical equipment rental and an official consultant survey (€2,500 to €3,500)—you can view both sample reports from a real investigation (file 26M13_V4) directly as PDFs below:
1. Sample Measurement Protocol from Akulap (4-Page PDF)
This exact 4-page numerical and graphical protocol is generated automatically by the included Akulap software at the push of a button after your measurement.
- • Summary levels LCeq, LAeq, and difference LCeq − LAeq (pre-screening)
- • Complete 1/3-octave band table (8 Hz to 100 Hz) vs. hearing threshold LHS
- • Automatic prominent tone test (5 dB neighborhood criterion) & rating level Lr
- • Documentation of normative calculation rules on pages 3 and 4
2. Sample Written Evaluation Report (5-Page PDF)
This is the detailed written evaluation produced when you process the 4-page Akulap PDF together with the proprietary expert AI template included in your rental kit using ChatGPT, Claude, or Gemini.
- • Structured 6-chapter report (Task overview through normative overall assessment)
- • Physical classification of energetic peaks across the 1/3-octave spectrum
- • Reliable prevention of layperson errors (e.g., positive Delta L2 peaks without tonal character)
- • Integrated formal disclaimer regarding local measurement conditions
Why Standard AI and Laypeople Misread DIN 45680 Tables—and Why Our Supplied Evaluation Bridge Is Essential
Uploading an acoustic measurement protocol into a generic AI without strict normative control rules almost always leads to severe misinterpretations. In sample measurement 26M13_V4, LCeq − LAeq is 25.5 dB (exceeding the >= 20 dB threshold), yet the rating level is Lr = 0.0 dB(A). Click the three inspection filters below to examine the critical pitfalls in the data:
Although the highest energetic mean levels (Lfeq) occur at 40 Hz (39.2 dB), 12.5 Hz (37.7 dB), and 31.5 Hz (35.5 dB), the time-corrected rating level LTerz,r remains below the human hearing threshold LHS across all bands from 8 Hz to 100 Hz (Delta L1 < 0 everywhere). Consequently, no band contributes excess energy, and the rating level is exactly Lr = 0.0 dB(A).
| Band f [Hz] | Mean Lfeq [dB] | Rating LTerz,r [dB] | Max LTerzFmax [dB] | Threshold LHS [dB] | Margin Delta L1 [dB] | Peak Margin Delta L2 [dB] | A-Corr. kA [dB] |
|---|---|---|---|---|---|---|---|
| 8 Hz | 32,7 | 32,7 | 46,2 | 103,0 | < 0 (-70,3) | < 0 (-56.8) | -77,8 |
| 10 Hz | 32,8 | 32,8 | 45,3 | 95,0 | < 0 (-62,2) | < 0 (-49.7) | -70,4 |
| 12,5 Hz | 37,7 | 37,7 | 47,9 | 87,0 | < 0 (-49,3) | < 0 (-39.1) | -63,4 |
| 16 Hz | 33,2 | 33,2 | 46,1 | 79,0 | < 0 (-45,8) | < 0 (-32.9) | -56,7 |
| 20 Hz | 29,6 | 29,6 | 39,9 | 71,0 | < 0 (-41,4) | < 0 (-31.1) | -50,5 |
| 25 Hz | 31,7 | 31,7 | 42,6 | 63,0 | < 0 (-31,3) | < 0 (-20.4) | -44,7 |
| 31,5 Hz | 35,5 | 35,5 | 46,2 | 55,5 | < 0 (-20,0) | < 0 (-9.3) [Trans. <0/<0] | -39,4 |
| 40 Hz | 39,2 | 39,2 | 45,0 | 48,0 | < 0 (-8,8) | < 0 (-3.0) [Diff. 3.7 dB < 5 dB] | -34,6 |
| 50 Hz | 28,6 | 28,6 | 40,2 | 40,5 | < 0 (-11,9) | < 0 (-0.3) | -30,2 |
| 63 Hz | 28,1 | 28,1 | 37,8 | 33,5 | < 0 (-5,4) | +4.3 (no prominent tone) | -26,2 |
| 80 Hz | 24,2 | 24,2 | 37,2 | 28,0 | < 0 (-3,8) | +9.2 (no prominent tone) | -22,5 |
| 100 Hz | 20,3 | 20,3 | 31,1 | 23,5 | < 0 (-3,2) | +7.6 (no prominent tone) | -19,1 |
The 5 Pillars of the Standardized DIN 45680 Rental Kit
Tamper-Proof Low-Frequency USB Microphone
Factory-calibrated precision USB measurement microphone with extended low-frequency response down to the infrasound range. Fixed sensitivity without gain knobs or switches that could be accidentally altered—including acoustic calibrator and calibration certificate.
Fully Automated Standard Calculation in Akulap
Captures long-term level history, uncompressed WAV raw data, 1/3-octave analysis (8 Hz – 100 Hz), LAeq, LCeq, LAFmax, maximum levels, and percentiles (L1 to L99), exporting the complete 4-page DIN 45680 protocol as a PDF at the push of a button.
Step-by-Step Video Instructions
Concise online videos demonstrate calibration, sound level measurement with Akulap, compliant microphone placement inside the room (room corners / pressure maxima of room modes), and starting long-term logging.
Supplied, Normatively Calibrated Expert AI Prompt
Included exclusively with the rental kit is our proprietary control template for ChatGPT, Claude, or Gemini. It enforces strict Akulap interpretation rules and translates your 4-page measurement protocol into an accurate 5-page written evaluation.
Clear Process Boundaries & Central Shop Checkout
All rental rates and terms are managed centrally via our online shop. By strictly excluding individual telephone evaluation support, the weekly rental remains highly economical.
In 3 Steps from DHL Delivery to Final Report
1. Connect the USB microphone to your Windows laptop and record. 2. Export the 4-page DIN 45680 PDF protocol from Akulap. 3. Load the PDF with the supplied proprietary AI template into your LLM.
System Comparison: Classical Handheld Meter Rental vs. Akulap Self-Service Kit (#1202m)
| Criterion | Classical Equipment Rental (Old) | Akulap Self-Service + AI Bridge (#1202m) |
|---|---|---|
| Customer Expectation | Expects free telephone consulting, training, and data evaluation by an engineer | Reviews both sample PDFs online beforehand and accepts: 100% self-service without consulting |
| On-Site Operation | Overwhelmed by complex menus on handheld analyzers (Svantek / NTi) | Plug-and-play USB microphone (no adjustable knobs) on Windows laptop + video guides |
| Result for Renter | Renter is left facing uninterpreted columns of raw numbers | Renter obtains 4-page Akulap PDF + structured written report via supplied AI template |
| Pricing & Booking | Manual quote generation, negotiations over evaluation support | Direct booking in online shop: Current weekly rate & terms transparently viewable online |
| Liability & Risk | Unclear boundaries regarding informal statements on third-party setups | Clear separation: Pure tool rental; renter assumes full responsibility for setup & interpretation |
Step-by-Step Videos: Sound Level Measurement, Calibration & DIN 45680
Our concise video tutorials prepare you specifically for operating rental kit #1202m—from understanding A/C frequency weighting in sound level measurements and calibration to DIN 45680 logging:
Sound Level Measurement in Akulap: Why dB(A) Attenuates Low Bass and How dB(C) − dB(A) Reveals Hum
Fundamentals of standard-compliant sound level measurement with Akulap: See and hear how A- and C-weighting behave at low frequencies and how the LCeq − LAeq >= 20 dB criterion works.
Clicking loads the video via youtube-nocookie.com (GDPR 2-click protection).
Calibrating the Measurement Chain in Akulap & Evaluating Recorded Measurement Files
Demonstration of level-accurate calibration using the supplied sound level calibrator, importing calibration factors, and selecting representative measurement intervals in Akulap.
Clicking loads the video via youtube-nocookie.com (GDPR 2-click protection).
DIN 45680 Measurement in Practice: Microphone Placement (Room Corners), Long-Term Logging & PDF Report
Step-by-step guide for rental customers: Positioning the USB measurement microphone in the most affected room per DIN 45680 Section 5 and exporting the 4-page test protocol.
This practical tutorial on room-corner microphone placement and automatic 4-page DIN 45680 PDF export is currently in post-production.
Pure Self-Service Rental & Liability Disclaimer for Self-Measurements
Before booking in our online shop, please note the following mandatory process boundaries that make this economical weekly rental rate possible:
This is a pure self-service equipment rental. We cannot review, comment on, or technically evaluate customer-recorded measurement data by phone or email.
Because Dr. Jordan Design does not supervise local measurement conditions on site (placement in room corners/pressure maxima, closed windows/doors, exclusion of internal background noise per DIN 45680 Section 5), execution and interpretation lie entirely in your responsibility. An AI can make mistakes and does not replace an accredited expert; Dr. Jordan Design must not be named as the surveyor for self-recorded measurements.
EDU Rental Complete Audio Measurement System for environmental mesurements
Turnkey professional system for your own Windows laptop/PC to investigate low-frequency hum (heat pumps, cooling units, HVAC) according to DIN 45680 and TA Lärm.
Direct booking, real-time availability, and shipping handled centrally in our online shop.
FAQ: DIN 45680 Weekly Rental Workflow, Package Contents & Shop Booking
What is included in rental kit #1202m and what computer do I need? ▼
You only need your own Windows laptop or PC. We ship via DHL the factory-calibrated low-frequency USB measurement microphone (fixed sensitivity without adjustable knobs), the matching sound level calibrator with certificate, the full Akulap software version (incl. DIN 45680 module), access to the video guides, and our proprietary expert AI evaluation bridge.
How is the 5-page written report generated from the 4-page Akulap protocol? ▼
The normatively exact translation of Akulap 1/3-octave tables (especially separating prominent tones from broadband noise and resolving Delta L2 peaks) contains our proprietary engineering know-how. Rental customers receive this calibrated template exclusively as part of rental kit #1202m. You can inspect the exact quality of the final output beforehand via our 5-page sample written report (PDF).
Where can I find the current rental rate and how do I book the system? ▼
All rental rates, deposits, and shipping terms are maintained centrally in our online shop. Simply click the green shop button on this page to go directly to the rental item in our webshop and place your order online.