MODEL 515BSM
UNIDIRECTIONAL DYNAMIC MICROPHONE
The Shure Model 515BSM is a low-impedance,
dynamic microphone designed for hand-held or fixed use.
The unidirectional (cardioid) pickup pattern provides excel-
lent reproduction of voice and effective rejection of feed-
back. The microphones are supplied with a push-to-talk
switch and a four-conductor, retractable cable (2 shielded
conductor).
These microphones are especially suitable for use in
paging systems, public speaking, stage performance, and
public address systems. They are also highly recom-
mended for other applications requiring both hand-held
and fixed installation operations. The microphones are
wired with the microphone circuit normally open for use in
parallel microphone installations.
Features
•
Frequency response optimized for announcing, narra-
tion, and paging applications
•
Cardioid pickup pattern: symmetrical about axis
•
Neodymium magnet for high signal-to-noise ratio
•
Shock-mounted cartridge for quiet operation and low
stand/handling noise
•
Tough diecast, locking grille and handle resist wear from
constant use and handling
•
Built-in push-to-talk switch controls both microphone
circuit and relay or control circuit
SPECIFICATIONS
Type
Dynamic (moving coil)
Frequency Response
80 to 15,000 Hz (see Figure 1)
.6 m (2 ft)
1 cm (
3
/
8
in.)
TYPICAL FREQUENCY RESPONSE
FIGURE 1
Polar Pattern
Cardioid (unidirectional). Effective rejection of sound
at rear of microphone is uniform at all frequencies,
while front pickup characteristics are uniform about
axis (see Figure 2).
150
o
120
o
150
o
120
o
180
o
30
o
60
o
90
o
30
o
60
o
90
o
–5 dB
–10 dB
–15 dB
–20 dB
0
10000 Hz
6400 Hz
2500 Hz
150
o
120
o
150
o
120
o
180
o
30
o
60
o
90
o
30
o
60
o
90
o
–5 dB
–10 dB
–15 dB
–20 dB
0
1000 Hz
500 Hz
250 Hz
TYPICAL POLAR PATTERN
FIGURE 2
Impedance
150
Ω
rated (180
Ω
actual)
Output Level (at 1,000 Hz)
Open Circuit Voltage*: –57.0 dBV/Pa* (0.14 mV)
*1 Pa=94 dB SPL
Model 515BSM User Guide
27
E
3088 (Rev.
4
)
©
200
5
, Shure Incorporated
Printed in U.S.A.
