Applications and Engineering
The Main Challenges in Urban Acoustic Design
Traffic is low frequency and everywhere, barriers miss upper floors, and open windows undo any facade. Here is what…
All guides
509 practical articles on making spaces quieter, from quick fixes to full acoustic treatment.
Noise Cancellation Technology
Does the iPhone Have Noise Cancellation?
Apple removed the old toggle at the iPhone 13. Here is what replaced it, how to turn on Voice Isolation, and which…
Noise Control & Soundproofing
Sound Masking vs Soundproofing: Which Do You Need?
Soundproofing removes noise, masking hides it. Here is what each costs, which one fixes office privacy or a sleepless…
Noise Cancellation Technology
How Microphone Arrays Detect and Cancel Noise
Arrays filter by direction instead of frequency, using arrival time differences. Here is how beamforming works and why…
Noise Cancellation Technology
Phase Shifting in Modern Noise Cancellation
ANC inverts a wave to cancel noise, and timing decides whether it works. Here is why it stops near 1 kHz, and what…
Noise Control & Soundproofing
Does Soundproofing Absorb or Block Noise?
Blocking needs mass and a seal. Absorption needs thickness and porosity. Here is why acoustic foam does nothing for your…
Noise Control & Soundproofing
Noise Reducing Ideas for Bathrooms That Work
The door leaks more than the wall and pipes are a separate problem. Here is what to seal, how to isolate pipework, and…
Speakers
How to Fix a Buzzing Sound From Speakers
Three kinds of buzz and one two minute test to tell them apart. Here are the ground loop fixes, the rattles people blame…
Speakers
Can You Take Bluetooth Speakers on a Plane?
Yes, in carry-on or checked. Here are the watt hour limits, the spare battery rule, and the one thing every airline will…
Speakers
Do Turntables Have Speakers?
Most do not. Here is why a turntable needs a phono stage and an amplifier, three ways to build the chain, and what…
Speakers
How Do You Bridge Speakers and Amplifiers?
You bridge an amplifier, not a speaker. Here is the wiring, the roughly 3x power gain, and the impedance rule that…
Speakers
What Cars Have Bose Speakers?
GM, Nissan, Infiniti, Mazda, Porsche and Hyundai fit Bose, but always by trim. Here is how to check your car and what it…