README.md

metadata

task_categories:
  - audio-classification
tags:
  - dolphin
  - bioacoustics
  - whistle-detection
  - audio
  - spectrogram
dataset_info:
  config_name: review-sample
  features:
    - name: audio
      dtype:
        audio:
          decode: false
    - name: spectrogram
      dtype: image
    - name: label
      dtype:
        class_label:
          names:
            '0': noise
            '1': whistle
    - name: file_name
      dtype: string
    - name: recording
      dtype: string
    - name: onset
      dtype: float64
    - name: offset
      dtype: float64
  splits:
    - name: train
      num_bytes: 37497957
      num_examples: 376
    - name: test
      num_bytes: 10431395
      num_examples: 104
  download_size: 38245514
  dataset_size: 47929352
configs:
  - config_name: default
    data_files:
      - split: test
        path: data/test-*
      - split: train
        path: data/train-*
      - split: validation
        path: data/validation-*
  - config_name: review-sample
    data_files:
      - split: train
        path: review-sample/train-*
      - split: test
        path: review-sample/test-*

OpenWhistle CNN Dataset

OpenWhistleNeurIPS26/OpenWhistle-CNN is the public CNN dataset used for binary dolphin whistle detection. It contains audio windows, spectrogram images, and binary labels:

• noise (label=0)
• whistle (label=1)

The main dataset is the complete session-disjoint dataset used for training and evaluation. A smaller deterministic review-sample config is also provided so reviewers can inspect representative examples quickly.

Dataset contents

• Hugging Face repo: OpenWhistleNeurIPS26/OpenWhistle-CNN
• Public columns: audio, spectrogram, label, file_name, recording, onset, offset

Full dataset splits

Split	Rows	Noise	Whistle	Sessions	Window hours
train	53,828	26,914	26,914	195	5.980885
validation	5,980	2,990	2,990	26	0.664445
test	16,708	8,354	8,354	261	1.856444
Total	76,516	38,258	38,258	482	8.501775

The train and validation splits come from the non-2019/2020 pool. The test split is a manual 2019-2020 test split built from the full classification all config.

Review sample

The review-sample config is a small deterministic subset of the same public dataset. It was created only to make review and manual inspection easier. It is not a replacement for the full dataset used for model development or reporting.

How the review sample was created

The review sample was designed to preserve the structure of the full dataset while keeping the download small enough for quick manual inspection. The sample keeps the same binary label definition as the full dataset and preserves the train/test separation: reviewer training examples are drawn from the original training and validation data, while reviewer test examples are drawn only from the original test data.

Within each reviewer split, examples were sampled separately for noise (label=0) and whistle (label=1) so that both classes are equally represented. This avoids a reviewer sample dominated by one class and makes it easier to inspect positives and negatives side by side. The target sizes were chosen to keep the same approximate train/test ratio as the full CNN dataset: 376 examples for train and 104 examples for test, for 480 examples total.

Sampling was deterministic, using seed 42, so the same review sample can be rebuilt exactly from the prepared public dataset. The resulting config is named review-sample.

Review sample size

Split	Rows	Noise	Whistle	Source splits	Source rows
train	376	188	188	train, validation	59,808
test	104	52	52	test	16,708
Total	480	240	240

Loading the data

from datasets import load_dataset

full = load_dataset("OpenWhistleNeurIPS26/OpenWhistle-CNN")
review = load_dataset("OpenWhistleNeurIPS26/OpenWhistle-CNN", "review-sample")