Loudness Class Reference

API for the Loudness Sensor. More...

Detailed Description

• ID: loudness
• Name: Loudness Sensor
• Other Names: Grove loudness hyld9767
• Category: sound
• Manufacturer: dfrobot seeed
• Link: http://www.dfrobot.com/index.php?route=product/product&product_id=83
• Connection: analog

This sensor family returns an analog voltage proportional to the loudness of the ambient environment. It's output does not correspond to a particular sound level in decibels. The higher the output voltage, the louder the ambient noise level.

This device uses an electret microphone for sound input.

This driver was developed using the DFRobot Loudness Sensor V2 and the Grove Loudness sensor.

    // Instantiate a Loudness sensor on analog pin A0, with an analog
    // reference voltage of LOUDNESS_AREF
    upm::Loudness loud(0, LOUDNESS_AREF);

    // Every tenth of a second, sample the loudness and output it's
    // corresponding analog voltage.

    while (shouldRun) {
        cout << "Detected loudness (volts): " << loud.loudness() << endl;

        upm_delay_us(100000);
    }

Public Member Functions
	Loudness (int pin, float aref=5.0)
	~Loudness ()
float	loudness ()

Protected Attributes
mraa::Aio	m_aio

Constructor & Destructor Documentation

Loudness	(	int	pin,
		float	aref = 5.0
	)

Loudness constructor

Parameters

pin	Analog pin to use
aref	Analog reference voltage; default is 5.0 V

~Loudness

(

)

Loudness destructor

Member Function Documentation

float loudness

(

)

Returns the voltage detected on the analog pin

Returns

The detected voltage

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The documentation for this class was generated from the following files:

• src/loudness/loudness.hpp
• src/loudness/loudness.cxx