Acoustics Basics is ideal for sound engineers, media professionals and audiophiles. The app includes a variety of tables, equations, tips and notes.

Also, includes a list of acceptable noise/sound levels for indoors and outdoors for a variety of building structures and environments.

Table of Contents:

- Abatement and Distance from Source
- Acceptable Noise - dBA - Levels
- Adding Decibels
- Blade Dampers and Noise Generation
- Blade Pass Frequency - BPF
- Classification of Noise Reduction Silencers
- Comparing Noise Criteria
- Daily Noise Dose Level
- Decibel
- Decibel A, B and C
- Directivity Coefficient and Sound Attenuation
- Ducts - Noise Generation
- EPA Protective Noise Levels
- Fans and Noise Power Generation
- Floor Vibration
- Frequency Limits for Octave Bands
- Ldn - Day and Night Sound Level
- Leq - Equivalent Sound Level
- Ls - Sound Exposure Level
- Machines - Sound Level Reduction
- Maximum A-Weighted Sound Levels Allowed
- NC - Noise Criterion
- Noise Exposure - Permissible Level and Duration
- Outdoor Ambient Sound Levels
- PNC - Preferred Noise Criterion
- Propagation of Sound Indoors
- Propagation of Sound Outdoors
- RC - Room Criteria
- REL - Noise Recommended Exposure Limit
- Reverberation Time
- Room Absorption Characteristics
- Sound Absorption Coefficients
- Sound Attenuation
- Sound Attenuation due to End Reflection
- Sound Attenuation in Duct Elbows
- Sound Attenuation in Unlined Sheet-Metal Ducts
- Sound Frequency, Wavelength and Octave
- Sound Intensity
- Sound Power
- Sound Power, Intensity and Pressure
- Sound Pressure
- Sound Pressure - Recommended Maximum Levels in Rooms
- Sound Transmission Through Massive Walls or Floors
- Sound Transmission through Duct Walls
- Speed of Sound
- Speed of Sound in some materials
- Speed of Sound in Gases
- Speed of Sound in some common Liquids
- Speed of Sound in some common Solids
- Subjective Effect of Change in Sound Pressure Level
- Telephones in Noisy Areas
- Voice Level and Distance

* All Content is Searchable
* All Content is available offline (no need for WiFi or Internet Connection)
* Please send us any questions, comments or suggestions using our website

What’s New

Version 3.9

- Fixed build issue

Ratings and Reviews

adrian_52 ,

Good, but...

Lacks of a better user interface. Also when I scroll down to the bottom of a page, the last ending phrase does not always show up. Please, fix this.

Thank you

Developer Response ,

These issues have been resolved in recent updates. Thanks for your feedback.

@robmiller ,

Good text reference

Good pocket reference for those who already have a sense for acoustics, but probably not for beginners. No calculators, text only. Surprised it's almost 7 MB for a text only app. I love supporting developers bringing acoustics apps to mobile devices though and hope the he/she continues building upon it!

App Privacy

The developer, FPC Ltd., has not provided details about its privacy practices and handling of data to Apple. For more information, see the developer’s privacy policy.

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