lampda::physical::microphone::SoundStruct Struct Reference

Handle the analysis of a sound sample. This structure handled the FastFourrier analysis of a sound sample, sound strenght, sound most active frequency, ... More...

#include <sound.h>

Static Public Member Functions
static constexpr float	get_fft_resolution_Hz ()
	Return the FFT resolution of a single FFT bin in Hertz.

Public Attributes
bool	isDataValid = false
	flag that indicate sound data validity
std::array< int16_t, SAMPLE_SIZE >	data
	raw audio data
std::array< int16_t, SAMPLE_SIZE >	rectifiedData
	audio data with auto gain enabled
float	sound_level_Db = 0.0f
	Sound level of this sample, in Decibels A.
float	maxAmplitude = 0.0f
	Maximum detected amplitude of this sample.
float	maxAmplitudeFrequency = 0.0f
	Maximum detected amplitude frequency of this sample, in Hertz.
bool	isFFTValid = false
	validity flag for the FFT results
std::array< float, SAMPLE_SIZE/2 >	fft_raw
	Results of the FFT process, in raw Hertz bins.
std::array< float, numberOfFFtChanels >	fft_log
	Results of the FFT process, in scaled logarithmic bins. This is closer to the sound sensitivity of the Human ear.
std::array< float, numberOfFFtChanels >	fft_log_end_frequencies
	Results of the FFT process, in maximum frequency for every bin.

Static Public Attributes
static constexpr auto	SAMPLE_SIZE = platform::microphone::PdmData::SAMPLE_SIZE
	Size fo the audio sample.
static constexpr uint8_t	numberOfFFtChanels = 24
	Define the number of FFt bins to use. You should set this number close to the lamp max X coordinates.

Detailed Description

Handle the analysis of a sound sample. This structure handled the FastFourrier analysis of a sound sample, sound strenght, sound most active frequency, ...

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The documentation for this struct was generated from the following file:

• src/system/physical/sound.h