Class: SoundSensor

Inherits:
Sensor show all
Defined in:
lib/sensors/sound_sensor.rb

Constant Summary

Constants inherited from Sensor

Sensor::POLL_INTERVAL

Instance Attribute Summary

Attributes inherited from Brick

#log, #port

Instance Method Summary collapse

Methods inherited from Sensor

#name, #off, #read_data, #set_input_mode, #wait_for_event

Constructor Details

#initialize(nxt, port = NXTComm::SENSOR_2) ⇒ SoundSensor

Returns a new instance of SoundSensor.



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# File 'lib/sensors/sound_sensor.rb', line 23

def initialize(nxt, port = NXTComm::SENSOR_2)
  super(nxt, port)
  use_adjusted_mode
end

Instance Method Details

#get_sound_level ⇒ Object

Get the current sound level as a float from 0 to 1.0. 1.0 is maximum, 0 is minimum.



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# File 'lib/sensors/sound_sensor.rb', line 30

def get_sound_level
  # TODO: should probably do some basic calibration here...
  read_data[:value_normal] / 1023.to_f
end

#use_adjusted_mode ⇒ Object

Sound level measurement is adjusted to match the psychoacoustic properties of human hearing. This is on by default.



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# File 'lib/sensors/sound_sensor.rb', line 44

def use_adjusted_mode
  set_input_mode(NXTComm::SOUND_DBA, NXTComm::RAWMODE)
end

#use_unadjusted_mode ⇒ Object

Sound level measurement is NOT adjusted to match the psychoacoustic properties of human hearing. Sounds that may not be loud to the human ear may show up as loud and vice versa.



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# File 'lib/sensors/sound_sensor.rb', line 38

def use_unadjusted_mode
  set_input_mode(NXTComm::SOUND_DB, NXTComm::RAWMODE)
end