Lubell
M10 Miniature Audio Transducer
GENERAL
The M10 transducer is a bone vibrator that
operates
in
the speech frequency range. The transducer can be used as either
an output transducer, converting an electrical input to vibratory force
or sound pressure, or as an input transducer, converting sound pressure
or vibratory force to electrical energy. In the bone vibrator
mode, the unit is placed against the user's head and audio information
is transferred directly to
the
inner ear without the need for a conducting medium. Conversely as
an input transducer, the unit functions as a microphone picking up
air-borne
or vibratory energy.
DESCRIPTION
The M10 is an electro magnetic device
operating
on the mass reaction principle. Very small air gaps provide high
efficiency and are held accurately in position with a four-leg leaf
spring.
A highly permeable nickel alloy armature and an Alnico magnet are also
a part of the rugged system. The M10 has solid wire leads for
attachment. All case
seams and openings are epoxy sealed to prevent device
contamination. The device can be encapsulated or potted by OEM's
to
provide additional protection or for underwater use.
MECHANICAL
Weight: 16 grams
Leads: 3" L, 18AWG, bare solid tinned copper wire, unterminated
Case: Black phenolic
ELECTRICAL
Impedance: 10 ohms @ 1kHz
D.C. Resistance: 3 ohms
PERFORMANCE CURVE
Test conditions - Unit mounted on a Bruel
& Kjaer 4930 artificial mastoid. The static load is 5.4
Newton.
Unit driven from low impedance source with test level 0.1 Vrms
(1.0mW). The
input level remained constant as the frequency varied. An input
level
20dB in excess of the test level (1.0 Vrms 100mW max) can be employed
with no measurable
effect
on the device, however levels significantly higher may cause distortion
and heating depending on the type of signal and its duration.
Price:
$55 Data sheet: M10.pdf
Lubell
Labs Inc.
21
N. Stanwood Rd.
Columbus,
Ohio 43209
(614)
235-6740 tel
Copyright
1996-2008 Lubell Labs Inc. All prices and specifications subject
to change without notice.