Sound Decibel Meter, Noise Meter. ESP32mini + ICS43434 + ESPHome

Share your Projects! Custom Integrations
1

I think I am getting too high decibel values from live reading.
How to modify correctly the YAML file?
Decibel values are not jumping, those are pretty stable on quiet room.

I am using these instructions:

I am using this YAML File at my ESPHome(ESP32mini):

Sensor is from Sensor Maestros:

Biltema handheld meter shows like 35dB on fast live reading
This setup described here shows like 58dB on fast live reading

At the ICS43434 board the L/R connection is not connected to anywhere, should I connect that and how if needed?

Any ideas or is it only that I should use the filtered values?

2

I just got this chip. from what I can tell, the LR pin is either HI or LOW thus selecting Left or Right. Im not sure if you leave it floating or need a pull-up or pulldown resistor - I haven’t gotten that far yet.

Would you mind sharing what pins on the board are defined in your config?

I see this in your config

i2s:
  bck_pin: 23
  ws_pin: 18
  din_pin: 19
  sample_rate: 48000            # default: 48000
  bits_per_sample: 32           # default: 32
  dma_buf_count: 8              # default: 8
  dma_buf_len: 256              # default: 256
  use_apll: true                # default: false

There are SD, WS and SCK pins on the board:
bck = ??
ws = ??
din = ??

Much appreciated!

3

bck_pin: 23 = bck = GPIO23 at ESP32mini
ws_pin: 18 = ws = GPIO18 at ESP32mini
din_pin: 19 = din = GPIO19 at ESP32mini

I tried to have VCC voltage on L/R and it did not give any values while I had VCC connected to it.

So I wonder how to set it High.

4

Did you ever get it to work ? I saw this photo and the L/R was grounded

5

Yes it is working well but live reading too high values. Thank you for the info I try grounding the L/R

6

Put mine together last night, seems to be working well. I was comparing the audio levels to a app I have on my phone SMARTERNOISE(Pro), I don’t know exact db levels but a estimate,.

7

Worth mentioning that decibels is a relative measurement, so the reading you’re getting from the Sound Level component is likely to be completely different from the measurement you get from your phone because they have different microphones and different noise thresholds.

For example, it’s commonly said that human conversation is around 60 decibels, but my sound meter app reports only negative values. This is because the reference for human conversation refers to dBSPL (decibels per sound pressure level) which is fixed to a reference point, but most measurements are not fixed in this way.

0dB is just the maximum value your sensor is able to measure.