| Applications |
|---|
| Battery Powered Devices |
| Headsets |
| Burglar Alarms |
| Video Cameras |
| Voice Recorders |
| Music Recorders |
| Attributes of MEMS microphones |
Attributes of ECM microphones |
| better performance |
needs to be larger for equal performance |
| reflow solder possible |
Hand or point soldered |
| higher cost |
low cost |
| less part to part variation |
greater part to part variation |
| less temperature sensitivity |
greater performance variation with temperature |
|
| Applications |
|---|
| Headsets |
| Telephones |
| Earphones |
| Cell Phones |
| Attributes of Receivers |
|---|
| Small size |
|
Sound volume limited to ear distance
|
| Low Power |
|
| Applications |
|---|
| Battery Powered Devices |
| Car Alarms |
| Smoke Alarms |
| Fire Alarms |
| Panel Indicators |
| Keypress Indicators |
| Door Chimes |
| Medical Device Alerts |
| Intercom Speakers |
| Sirens |
| Alarms |
| Attributes of Piezo Sounders |
Attributes of Magnetic Sounders |
| low current |
higher current |
| very loud (greater than 120 dB at 30cm) |
Needs more power to reach sound levels |
| small size (SMDs available) |
|
| single or multitone |
wider bandwidth |
| frequency depends on size. (low frequency=large size) |
low frequencies in small size |
|
| Applications |
|---|
| Any application of voice or music |
| Attributes of Piezo Speakers |
Attributes of Magnetic Speakers |
| low current |
higher current |
| lower bandwidth |
wide bandwidth of sound |
| small size (can be very thin) |
|
| low sound volume |
volume limited only by power and size |
| low fidelity |
very high fidelity |
|
| Applications Transducers |
|---|
| Pest Repellents |
| Vaporizers |
| Ultrasonic Cleaners |
| Ultrasonic Mixers |
| Applications of Sensors |
|---|
| Motion Detectors |
| Proximity detectors |
| Attributes of transducers |
Attributes of ultrasonic sensors |
| Transmit only |
Contains transmitter and receiver functions in one unit |
| High Power |
Typical range is 3m |
|
