Get The Decibel Level From A Mic In Rust

#!/usr/bin/env cargo +nightly -Zscript

//! ```cargo
//! [dependencies]
//! anyhow = "1.0.75"
//! clap = "4.4.7"
//! cpal = "0.15.2"
//! ```

use cpal::traits::{DeviceTrait, HostTrait, StreamTrait};

fn main() -> Result<(), anyhow::Error> {
    let host = cpal::default_host();
    let device = host.default_input_device().unwrap();
    let config: cpal::StreamConfig = device.default_input_config().unwrap().into();
    let input_sender = move |data: &[f32], _cb: &cpal::InputCallbackInfo| {
        let x: f32 = data[0];
        if x > 0.006 {
            println!("{}", x);
        }
    };
    let input_stream = device
        .build_input_stream(&config, input_sender, err_fn, None)
        .unwrap();
    let _ = input_stream.play();
    std::thread::sleep(std::time::Duration::from_secs(32536000));
    Ok(())
}

fn err_fn(err: cpal::StreamError) {
    eprintln!("an error occurred on stream: {}", err);
}