Design Guide: Band Training Facilities
Glazing recommended in or adjacent to room doors, so
Chalkboard, with chalk tray; 4' x 8' recommended.
people outside can see in without disturbing activities in
Heavy curtains and tracks to permit acoustical variabil-
ity (see 4-2.F.2).
Flourescent lighting must have remote ballast.
Silent-type wall clock required.
Fire alarm system should have flashing light and alarm
F. Technical Recommendations
in all music rooms.
(see also Chapter 5).
If doors to outside are provided, they shall be equipped
with panic hardware.
1. Sound Isolation.
One set of double doors are required for movement of
Carefully locate (and limit) weak points in the acoustic
grand piano. See 5-2D for recommended configuration.
separation such as doors and windows.
q Use fully gasketed or proprietary acoustical doors (suggest
4-3 Group Practice Rooms
STC 40), or provide sound locks.
q Double glaze any interior windows (as those to the Con-
trol Room); space the two panes several inches apart.
q Single story, slab-on-grade construction is the most eco- (see also Paragraph 2-3).
nomical way to provide sound isolation.
q One Large Group Practice Room must be large enough
to accommodate rehearsal and practice sessions of a
q Heavy masonry wall construction is greatly preferable
20-25 person Stage Band, or smaller groups or
to stud wall construction. Double wall, with cavity, rec-
ommended between music spaces, if adjacent.
q Small Group Practice Rooms should accommodate
q Avoid the use of natural ventilation, since it precludes
groups of 8-12 people each.
sound isolation and the humidity control necessary to store
q Access for large instruments must be provided to all of
the Group Practice Rooms. The rooms should be able
q Acoustically lined sheet metal ducts for supply and return
to accommodate a grand piano and possibly large per-
air, sized for adequately low velocity to achieve NC-25.
q Perfectly seal all joints and penetrations to make the room
virtually airtight. Even small leaks admit sound.
B. Size and Critical Dimensions
q Avoid rigid paths for sound transmission, such as electri- q
Large Group Practice Rooms - 700 NSF.
cal conduit. Use non-metallic conduit at music room
walls. No outlets back-to-back. Where resiliently sepa- q Small Group Practice Rooms - 300-350 NSF each.
rated double constructions are used, do not bridge them q Average ceiling height of 18' is recommended; 15' is abso-
with rigid ties. Even minor ties, unless resilient, impair
q Length, width and height should not be equal to each
other, nor should they be multiples of each other. Inte-
gral room dimensions - i.e. length:
Inadequate volume is a pervasive problem in rehearsal
width: height ratios of 1:1:1, 3:2:1, etc. - are conducive
rooms; see 4-2.B, Size and Critical Dimensions.
to a clustering of standing waves. Such rooms tend
Apply extensive amounts of sound absorbing material
to "sing" disturbingly in response to specific sounds that
that is effective over a wide frequency range, includ-
match the pitch of the standing waves. This problem
ing the low frequencies (at and below 125 hz), Absorp-
is confined to smaller rooms, and is not a consideration
tive material should not be limited to the ceiling but
in the Main Rehearsal Room.
should be applied to the walls as well. Movable curtains q
afford acoustical variability. (See Paragraph 3-5 and
be elongated rather than roughly square, for rehearsal
Chapter 5 for details).
of Jazz Bands in straight-line rows. (see Figures 4-2
Make the ceiling partially reflective. Typically, use sus-
A & B, and Figures 4-3 A & B)
pended acoustic tile, but over approximately one-half of
C. Spatial Character and Organization.
the ceiling area, centered in the room, make a 50-50
checkerboard (minimum 4' x 4' modules) of hard and
absorptive materials. For example, insert gypsum board q Large room volume is required to control loudness of
sound, for good room acoustics and to protect person-
in the ceiling grid. Note that this will limit the hard areas
nel from hearing damage (see Paragraph 3-5).
to approximately one-quarter of the ceiling area.
q Splayed walls are beneficial for sound diffusion, espe-
cially in the Large Group Practice Room. Parallel walls
q Avoid carpet in the rehearsal room it has little acoustic
can be used, with appropriate surface treatments (see
effect and may be a maintenance problem (hard-
surfaced floors are generally preferred).
q Windows for natural light are desirable, although glaz-
q Lockable doors required, with good-quality hardware, for
ing should be used with care to avoid glare and to be
security of expensive instruments.