TY - GEN
T1 - An electromagnetically actuated micromachined loudspeaker for hearing aids applications
AU - Je, Sang Soo
AU - Chae, Junseok
PY - 2007/12/1
Y1 - 2007/12/1
N2 - We present an electromagnetically actuated micromachined loudspeaker for hearing aid applications. The device has multi-layers of copper-coils, a NiFe soft magnet on polyimide membrane, and a NdFeB permanent magnet on its perimeter. Coil impedance is measured as 1.5 Ω and shows very flat at all over the audio frequency range. The resonant frequency of the loudspeaker is at much away from human audio frequency range to avoid unwanted spike responses. The device operates in low power, only requires tens of milli-ampere; the peak displacement, 7 urn, occurs at 88 mA, which corresponds to 110 dB SPL (Sound Pressure Level). While the micro-speaker generates 106 dB SPL, it consumes only 0.13 mW at 1 kHz, which is more than at least 10 times less power consumption than any existing MEMS (Micro-Electro-Mechanical-Systems) microspeakers, almost equivalent to existing non-MEMS minispeakers being used in hearing aids.
AB - We present an electromagnetically actuated micromachined loudspeaker for hearing aid applications. The device has multi-layers of copper-coils, a NiFe soft magnet on polyimide membrane, and a NdFeB permanent magnet on its perimeter. Coil impedance is measured as 1.5 Ω and shows very flat at all over the audio frequency range. The resonant frequency of the loudspeaker is at much away from human audio frequency range to avoid unwanted spike responses. The device operates in low power, only requires tens of milli-ampere; the peak displacement, 7 urn, occurs at 88 mA, which corresponds to 110 dB SPL (Sound Pressure Level). While the micro-speaker generates 106 dB SPL, it consumes only 0.13 mW at 1 kHz, which is more than at least 10 times less power consumption than any existing MEMS (Micro-Electro-Mechanical-Systems) microspeakers, almost equivalent to existing non-MEMS minispeakers being used in hearing aids.
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U2 - 10.1109/ICSENS.2007.4388579
DO - 10.1109/ICSENS.2007.4388579
M3 - Conference contribution
AN - SCOPUS:48449098459
SN - 1424412617
SN - 9781424412617
T3 - Proceedings of IEEE Sensors
SP - 1024
EP - 1027
BT - The 6th IEEE Conference on SENSORS, IEEE SENSORS 2007
T2 - 6th IEEE Conference on SENSORS, IEEE SENSORS 2007
Y2 - 28 October 2007 through 31 October 2007
ER -