Meeting Topic: Acoustical Consulting
Moderator Name: Alexandra Marie Hegedus
Speaker Name: Gavin Haverstick: Founder and Owner of Haverstick Designs
Meeting Location: Muncie, IN, USA
He's a musician
BS in Mechanical Engineering at Colorado State University
Member of NCAC and AES
Lead Acoustical Engineer at Auralex Acoustics 01-09.
Prominent projects include: Ringo Starr, Coldplay, Disney, Apple, Berklee, Rock and Roll Hall of Fame, Smashing Pumpkins, etc.
Types of Acoustical Consulting Services
Architectural Acoustics
Environmental Noise Control
Industrial Noise Control
Mechanical Noise and Vibration Control
Sound System Design
Room Acoustics
Reverb time
Frequency response
Impulse response - reflections
Overall sound quality
Speech intelligibility
Speaker and listening position optimization
subjective science
Sound Transmission
Disturbing roommates or neighbors
Outside noise
Construction
Applications - recording studios, houses of worship, home theaters, conference rooms, auditoriums, restaurants, offices, live music venues, interrogation rooms, gyms, classrooms
Sound Isolations - what stops sound
Mass - add more material
Decoupling - like the shocks in cars, absorbs the sound
Construction approach
ABSORBERS DO NOT STOP SOUND
Room Correction Software
Only affects the frequency domain
Room Modes
Standing Waves - f <~ 200 Hz
Nodes and Antinodes in all small rooms
Axial - two surfaces
Bass traps on the ceiling, sides, back, etc.
Tangential - four surfaces
Corners are treated
Oblique - 6 surfaces
38% point is the best place for your mix position
Speed of sound = 1.13 ft/ms
Acoustical Materials
Absorption
Passive
Active
Diffusion
Scatters the energy
Bass traps
Reduces peaks and dips in the low frequency range
Written By: Peyton Cox
