The invention is a sex toy to provide sexual pleasure. The transmission curve has an attenuation range which covers the mid-frequency. The flexible flow valve has at least one opening and may be located between the first device port and both the second device port and the suction port. At least one acoustic property is determined for the place of origin using signals detected as a result of the plurality of actuations. A natural language query may be semantically interpreted to determine one or more annotations from the query.