The very essence of a scientific society is the promotion of cooperation and the exchange of information among scientists. Bob's contribution to acoustics in this field is twofold. First, he is deeply involved in the publication of acoustics literature, particularly the Russian Acoustical Journal (previously Soviet Physics---Acoustics, now Acoustical Physics). Perfect knowledge of the languages, a deep interest in the creative work, a wide range of interests, and an extensive outlook help him in this activity. Second, being openhearted and having a friendly nature, with a live interest in his colleagues, he does a lot to develop scientific links and contacts. When he visited USSR in 1958, he immediately switched on acoustical community activity, participated in the Ph.D. thesis defense of Lev Zarembo, and started a long-lived cooperation with Russian colleagues. He has educated Ph.D. and postdoctoral students from China, Norway, Russia, etc. All of them are grateful to Bob and keep a lot of good recollections. Each meeting with him leaves you with a feeling of cordial warmth and friendly concern.