Acoustic test prep

Question 1

What is a Staggered wall stud?

Answer 1

When the studs are staggered and don’t touch

Question 2

Whats does HVAC stand for?

Answer 2

Heating Ventilation and Air Conditioning

Question 3

Air flows through what feature of the A/C ventilation process?

Answer 3

Plenums

Question 4

Whats the deal airflow in a studio

Answer 4

High Volume / Low Velocity

Question 5

What is RT60

Answer 5

The time it takes for the initial level of volume to drop 60dB

Question 6

A structure designed for overhead mounting

Answer 6

Cloud

Question 7

A Banner
A Hanging baffle

Answer 7

Hangs vertically

Hangs hamburger style

Question 8

Splaying a window

Answer 8

Taking off parallel possibilities

Windows at an angle

Question 9

Average window splay angle

Answer 9

6 degrees

Question 10

what are 2 reasons to float a floor

Answer 10

air space
structural noise / outside vibrations

Question 11

What is a sound lock

Answer 11

2 doors in series creating a corridor and sound isolation

Question 12

Noise Criterion

Answer 12

A number rating how quiet the room is
All ambient noise (level/frequency) at time of the test is recorded

Question 13

Music Recording Facilities Criterion should be within

Answer 13

[NC 15-25]

Question 14

A Diffuser is used to

Answer 14

Scatter sound

Question 15

In terms of absorption coefficients the closer to 1 is more

Answer 15

Absorbtive

Question 16

A soft porous material will generally have a

Answer 16

closer to 1 (AC) absorbtive coefficient

Question 17

A tuned cavity designed to absorb a specific frequency

Answer 17

Helmholtz

Question 18

Whats an anechoic chamber

Answer 18

A room that disolves all frequencies

Question 19

Another word for floating or separating a room/space

Answer 19

De-coupling

Question 20

Early reflections

Answer 20

Phase

Question 21

Extremely durable and great for De-coupling

Answer 21

Neoprene

Question 22

The point in a room where direct and reflective sound are perceived as the same loudness

Answer 22

Critical distance

Question 23

Small reflective room first reflection hits you 40ms later

Answer 23

Fusion Zone

Question 24

The three types of room modes are

and

How many walls

Answer 24

Axial mode- 2 walls
Tangential- 4walls
Oblique- 6 walls

Question 25

A waveform with a short lambda

Answer 25

High freq

Question 27

Critical distance

Answer 27

The point in a room where direct and reflected sound are perceived to be equal loudness.