Use observations you already have
Describe whether the sound followed movement, water entering, emptying or a pause in the programme. Say whether it happened with one load or several normal uses and whether the cabinet itself moved. The sound alone cannot confirm a bearing, motor or pump fault; the selected stage and changed performance help place it in context.
A recording is optional
If a short recording already exists, it can support the description, but it should not contain private conversations or other people's details. Do not restart an unsafe or leaking machine solely to record it. Choose the relevant appliance for your Locksbottom enquiry and mention safe access, the model reference and the point when the noise began.