<ion-item>
          <ion-label stacked>Test</ion-label>
          <ion-input formControlName="teste" [ngModel]="teste" type="text"></ion-input>
          <button large type="button" (click)="input_to_voice($event)" clear ion-button icon-only item-end>
            <ion-icon name="mic"></ion-icon>
          </button>
        </ion-item>

input_to_voice(event, value) {

    //here I wanted to get a reference to the input value, but I'm stuck
    console.log(event.target.parentElement.parentElement);

    let options = {
      language: "en-GB"
    };

    // Start the recognition process
    this.speechRecognition.startListening(options)
      .subscribe(
        (matches: Array<string>) => console.log(matches),
        (onerror) => console.log('error:', onerror)
      )
  }