Bespoke Silencer Report Generator

Report Generation in PDF

Satoshi Matsumoto

Introduction

  • Business service provider for manufacturing industry in Estonia
  • Specializing in easy-report generation applications
  • Providing reporting services using modern web app technology

Contact: contact@satom.eu

The Challenge

  • Manual report creation takes 1 hour per document
  • Multiple cases require more than several hours of work

Typical Errors

  • Word typos
  • Incorrectly pasted tables
  • Calculation errors
  • Inconsistent formatting
  • Delayed customer response times

A web application

  • Calculates rectangular silencer performance
  • Generates professional PDF reports
  • Takes less than one minute to produce results
  • Minimizes human error

Web App Functions

  • Input Parameters:
    • Air flow of AHU
    • Silencer location (supply/exhaust, before/after fan)
    • Silencer dimensions (width, height, length)
    • Cassette specifications (width, gap)
  • Output Values:
    • Face velocity
    • Pressure drop
    • Noise rating
    • Attenuation values
    • Self-generated sound pressure
    • Product code (model name + size info)

Generated Report Content

  • Complete sound power analysis by octave bands:
    • 63Hz, 125Hz, 250Hz, 500Hz, 1000Hz, 2000Hz, 4000Hz, 8000Hz
  • Sound power before silencer
  • Self-generated sound power
  • Sound power after silencer
  • Overall values
  • Noise rating after silencer

Report Example

Report Generation Process

  1. Input parameters
  2. Add manual attenuation values
  3. Click “Generate Report” button
  4. PDF document created in under 1 minute

App Interface

Keys

  • Accuracy: Reliable product information
  • Efficiency: Reports in under 1 minute
  • Professionalism: High-quality tables and charts
  • Impression: High-resolution PDF output

Time Savings

Task Manual Process Web App Time Saved
Review Specs 15-30 mins 15-30 mins 0 mins
Data Entry 15-20 mins 2-3 mins ~15 mins
Calculations 10-15 mins <1 min ~14 mins
Report Creation 15-20 mins <1 min ~19 mins
Total 55-85 mins ~20-35 mins ~48 mins (60%)

Technology Tools

  • Interactive web interface: Shiny

  • PDF document generation: typst

  • Development environment: RStudio

  • Computational language: R

Future Enhancements

  • Automated attenuation value calculations
  • Functions to add pressure loss factors
  • Unit converters of air flow.
  • Selecting another model.

Questions?

Thank you for your attention!