2403 263 00301
DONAU SLIM ENHANCED 11x15x3.0 mm SPEAKER
The 11 x 15 x 3.0 mm rectangular speaker is a
high end miniature speaker specifically designed
for portable devices and smartphones where high
quality sound is required.
It delivers pure , uncolored sound reproduction in
applications with small space.
Suitable for mono and stereo applications.
It offers a low resonance frequency of 800Hz in
the 1cm³ back cavity.
The speaker’s compound membrane has an
additional stiffening plate - made from a unique,
lightweight composite material - that provides
inner damping and results in extremely low
Total Harmonic Distortion (THD) values.
Features:
•
•
Rectangular shape that measures only
11 x 15 x 3.0 mm
Pure, uncolored sound reproduction
- Flat, wideband frequency response
- Lowest resonance frequency (800 Hz)
in 1cm³ back cavity
Clear music and voice reproduction
- Unique compound membrane with
additional stiffening plate of lightweight
composite material for inner damping
and low THD
Extremely robust spring connector
100% in-line measurement of all
specified acoustical and electrical
parameters.
Power handling up to 600mw.
•
•
•
•
Page 1 of 18
©2013 Knowles Electronics
2403 263 00301
Contents
1.
2.
Theory of operation............................................................................................................................. 3
Mechanical Layout and Dimensions.................................................................................................... 4
2.1. Main Dimensions .........................................................................................................................4
2.2. Spring force .................................................................................................................................4
2.3. PWB Layout .................................................................................................................................5
2.4. Magnetic polarity ........................................................................................................................5
2.5. Force layout .................................................................................................................................5
2.6. Part Marking/Labeling .................................................................................................................6
2.7. Material List .................................................................................................................................7
Electrical and Acoustical Specifications............................................................................................... 8
3.1. Frequency response ....................................................................................................................8
3.2. Electro-Acoustic Parameters .......................................................................................................9
3.3. Power definition for life time test ...............................................................................................9
3.4. Measured Parameters ...............................................................................................................10
3.5. Measurement setup ..................................................................................................................11
3.6. Measurement adapter 1cm
3
..................................................................................................... 11
Environmental Conditions ................................................................................................................. 12
4.1. Storage.......................................................................................................................................12
4.2. Transportation ...........................................................................................................................12
4.3. Functionality ..............................................................................................................................12
Environmental tests .......................................................................................................................... 13
5.1. Qualification tests......................................................................................................................13
5.2. Reliability tests ..........................................................................................................................13
5.3. Sample Size, Sequence ..............................................................................................................13
5.4. Period of Shelf-Life ....................................................................................................................13
5.5. Testing Procedures ....................................................................................................................13
Related Documents ........................................................................................................................... 13
Change History .................................................................................................................................. 18
Disclaimer .......................................................................................................................................... 18
3.
4.
5.
6.
7.
8.
Release – Revision: A
Page 2 of 18
©2013 Knowles Electronics
2403 263 00301
1.
Theory of operation
Donau Slim Enhanced 11x15x3.0 mm Speaker is an electro-dynamic transducer, designed to translate
electrical analog signals into sound. The input signal is fed into a coil in a magnetic field, which is
attached to a membrane. Through the principle of the electromagnetic force, the membrane is moved
according to the contents of the input signal.
Release – Revision: A
Page 3 of 18
©2013 Knowles Electronics
2403 263 00301
2.
Mechanical Layout and Dimensions
2.1. Main Dimensions
2.2. Spring force
Release – Revision: A
Page 4 of 18
©2013 Knowles Electronics
2403 263 00301
2.3. PWB Layout
2.4. Magnetic polarity
2.5. Force layout
STATICAL FORCES ON DIFFERENT STATES OF COMPONENT
STATE
FROM FRONT TO BACK
FROM SIDE 1 TO SIDE 3
FROM SIDE 2 TO SIDE4
TO POT
TO MEMBRANE
PULL FORCE OF YOKE
MIN. SURFACE OF
PRESSURE [mm
2
]
-
3
10
-
-
-
-
MAX. PERMANENT
FORCE [N]
15
10
10
10
0
10
10
MAX. HANDLING
FORCE [N]
20
15
15
15
0
15
15
PULL OFF FORCE
Release – Revision: A
Page 5 of 18
©2013 Knowles Electronics
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