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In some implementations, the device housing 702 includes a plurality of speaker openings 718 at its bottom rim surface. When the doorbell camera 106 is mounted onto a wall or doorframe surface, the speaker holes 718 are not visible from a gaze of a visitor approaching or standing near the surface, while still being able to broadcast audio messages to the visitor. In embodiments where the doorbell camera 106 includes both the microphone and the speaker, a remote user may review live video streams captured by the camera module of the doorbell camera 106, and have a conversation in real time with the visitor. In some implementations, both the microphone and the speaker of the doorbell camera 106
adopt waterproof features to deter water permeation into the electronic components within the device housing 702 and cause irreversible damages to the electronic components. Specifically, the waterproof features may be integrated at the openings 716 and 718 to deter water permeation such as from a jet or stream of water impinging on at least one of the openings 716 and 718. In an example, the microphone may be disposed inside the device housing 102, and include a
sound input region offset from the microphone aperture 716. A hydrophobic membrane is affixed to a first interior surface of the device housing 702 and covers the microphone aperture 716 thereon. The hydrophobic membrane is configured to allow transmission of sound waves and block water intrusion from the microphone aperture 716. A sound transmission channel couples the sound input region of the microphone to the microphone aperture 716 on the front cover plate 708. The sound transmission channel is configured to allow sound waves transmitted through the microphone aperture 716 and the hydrophobic membrane to be coupled to the sound input region of the microphone without exposing the sound input region to damaging pressures due to environmental impacts on the doorbell camera 106. In some implementations, the speaker may also adopt a sound input region offset from the speaker openings 718 and a respective hydrophobic membrane to block water intrusion while allowing transmission of sound waves from the speaker openings 718 to the sound input region of the speaker.
Blandit Etiam
This is available for the battery powered
Nest Protect, but, of course, you can also purchase the
wired variant, which will have additional AC connector pins on the back side to attach a 230V cable connector. The device itself is not really bigger than the average smoke detector from the market, measuring 1. 63 x 5. 28 inches and the install process follows the same steps: after choosing the rooms in which you’re going to install the Nest Protect at least in every room which has a fuel burning appliance, you need to make sure there is a minimum of 10 feet from any cooking appliance and avoid placing it on a corner you can choose either a wall or the ceiling. Then, you need to take the provided backplate and fix it to the wall/ceiling using the four screws and afterwards, just connect the smoke detector to the backplate using a circular motion if you have the wire powered version, the installing process also includes connecting the device to a power source, but, it’s ideal that this is done by a qualified person, to make sure the installation is made in accordance with the country or state’s regulations. The way to differentiate the first and the second generation of Nest Protect is by verifying if it has a battery door the Nest Protect 1 does not have one, verify the back plate the second generation has a round backplate, while the first has a square plate and the easiest one is to look at the edges of the device the second generation has rounded corners all around the case, while the first gen has straight edges. Right now, on the market, there are three types of smoke detectors: those that use ionization sensors, those that use photoelectric sensors and lastly, those that use both type of sensors also called dual sensor smoke alarms. The Nest Protect, theoretically, falls into the last category, but things are a bit more complicated because it doesn’t have a ionization sensor, but it does use the Split Spectrum Sensor which nullifies the need of the radioactive ionization sensor as you know, it detects smoke produced by flaming fires which burn at a fast rate so, if the ionized air is disrupted by smoke, it triggers the alarm. The photoelectric sensors is used to detect any smouldering fires that uses a light beam which, normally does not hit the sensor, but when smoke scatters the light particles, it will hit the sensor, therefore triggering the alarms – this method is used to detect a fire in its early stages, therefore reacting a lot faster. Now, the Split Spectrum Sensor should detect both the flaming fires and the smouldering ones, by adding a blue LED light at a wavelength of 450nm to look for small particles which are an indicator of a rapid, fast burning fire and keeping the usual photoelectric sensor to detect smouldering fires. To make sure it doesn’t repeat the mistakes of its predecessor annoying false alarms, the new sensor is isolated from any outside light and the encasing is designed to only allow smoke in and nothing else this worked just fine since the second generation of Nest Protect is indeed less prone to false alarms.
