radiation_pressure

radiation_pressure applies radiation pressure correction to a modulation waveform. It rewrites a waveform computed by sine or similar in place.

Acoustic radiation pressure is proportional to the square of the sound pressure. Since sine and similar functions specify the amplitude of the sound pressure, taking the square root of each sample is necessary when the radiation pressure should match the target waveform. radiation_pressure performs this correction.

Each sample is rewritten by the following equation.

API

Rust

radiation_pressure(&mut buffer);

Python

radiation_pressure(buffer)

C#

Modulation.RadiationPressure(buffer);

radiation_pressure

Parameter	Type	Description
samples	&mut [u8]	modulation waveform to correct

Example

Rust

use autd3_rs::units::Hz;
use autd3_rs::value::SamplingConfig;
use autd3_rs_modulation::{SineOption, modulation_buffer, radiation_pressure, sine};

let mut buffer = modulation_buffer();
sine(150 * Hz, &SineOption::default(), SamplingConfig::FREQ_4K, &mut buffer)?;

radiation_pressure(&mut buffer);

Python

from autd3.units import Hz
from autd3.value import SamplingConfig
from autd3_modulation import SineOption, modulation_buffer, radiation_pressure, sine

buffer = modulation_buffer()
sine(150 * Hz, SineOption(), SamplingConfig.FREQ_4K, buffer)

radiation_pressure(buffer)

C#

using AUTD3;
using static AUTD3.Units;

var buffer = Modulation.ModulationBuffer();
Modulation.Sine(150 * Hz, new SineOption(), SamplingConfig.Freq4k, buffer);

Modulation.RadiationPressure(buffer);